diff --git a/.jscsrc b/.jscsrc
new file mode 100644
index 0000000..423b011
--- /dev/null
+++ b/.jscsrc
@@ -0,0 +1,14 @@
+{
+	"preset": "google",
+	"validateIndentation": "\t",
+	"maximumLineLength": 120,
+	"jsDoc": {
+		"checkAnnotations": {
+			"preset": "jsdoc3",
+			"extra": {
+				"preserve": true
+			}
+		}
+	},
+	"requireCamelCaseOrUpperCaseIdentifiers": true
+}
diff --git a/src/gridstack.js b/src/gridstack.js
index 15e2a2a..ac1d889 100644
--- a/src/gridstack.js
+++ b/src/gridstack.js
@@ -6,1015 +6,1184 @@
  * @preserve
 */
 (function(factory) {
-    if (typeof define === 'function' && define.amd) {
-        define(['jquery', 'lodash', 'jquery-ui/core', 'jquery-ui/widget', 'jquery-ui/mouse', 'jquery-ui/draggable',
-            'jquery-ui/resizable'], factory);
-    }
-    else if (typeof exports !== 'undefined') {
-      try { jQuery = require('jquery'); } catch(e) {}
-      try { _ = require('lodash'); } catch(e) {}
-      factory(jQuery, _);
-    }
-    else {
-        factory(jQuery, _);
-    }
+	if (typeof define === 'function' && define.amd) {
+		define(['jquery', 'lodash', 'jquery-ui/core', 'jquery-ui/widget', 'jquery-ui/mouse', 'jquery-ui/draggable',
+			'jquery-ui/resizable'], factory);
+	} else if (typeof exports !== 'undefined') {
+		try { jQuery = require('jquery'); } catch (e) {}
+		try { _ = require('lodash'); } catch (e) {}
+		factory(jQuery, _);
+	} else {
+		factory(jQuery, _);
+	}
 })(function($, _) {
 
-    var scope = window;
-
-    var Utils = {
-        is_intercepted: function(a, b) {
-            return !(a.x + a.width <= b.x || b.x + b.width <= a.x || a.y + a.height <= b.y || b.y + b.height <= a.y);
-        },
-
-        sort: function(nodes, dir, width) {
-            width = width || _.chain(nodes).map(function(node) { return node.x + node.width; }).max().value();
-            dir = dir != -1 ? 1 : -1;
-            return _.sortBy(nodes, function(n) { return dir * (n.x + n.y * width); });
-        },
-
-        create_stylesheet: function(id) {
-            var style = document.createElement('style');
-            style.setAttribute('type', 'text/css');
-            style.setAttribute('data-gs-id', id);
-            if (style.styleSheet) {
-                style.styleSheet.cssText = '';
-            }
-            else {
-                style.appendChild(document.createTextNode(''));
-            }
-            document.getElementsByTagName('head')[0].appendChild(style);
-            return style.sheet;
-        },
-        remove_stylesheet: function(id) {
-            $("STYLE[data-gs-id=" + id +"]").remove();
-        },
-        insert_css_rule: function(sheet, selector, rules, index) {
-            if (typeof sheet.insertRule === 'function') {
-                sheet.insertRule(selector + '{' + rules + '}', index);
-            }
-            else if (typeof sheet.addRule === 'function') {
-                sheet.addRule(selector, rules, index);
-            }
-        },
-
-        toBool: function(v) {
-            if (typeof v == 'boolean')
-                return v;
-            if (typeof v == 'string') {
-                v = v.toLowerCase();
-                return !(v == '' || v == 'no' || v == 'false' || v == '0');
-            }
-            return Boolean(v);
-        }
-    };
-
-    var id_seq = 0;
-
-    var GridStackEngine = function(width, onchange, float_mode, height, items) {
-        this.width = width;
-        this['float'] = float_mode || false;
-        this.height = height || 0;
-
-        this.nodes = items || [];
-        this.onchange = onchange || function() {};
-
-        this._update_counter = 0;
-        this._float = this['float'];
-    };
-
-    GridStackEngine.prototype.batch_update = function() {
-        this._update_counter = 1;
-        this.float = true;
-    };
-
-    GridStackEngine.prototype.commit = function() {
-        this._update_counter = 0;
-        if (this._update_counter == 0) {
-            this.float = this._float;
-            this._pack_nodes();
-            this._notify();
-        }
-    };
-
-    GridStackEngine.prototype._fix_collisions = function(node) {
-        this._sort_nodes(-1);
-
-        var nn = node, has_locked = Boolean(_.find(this.nodes, function(n) { return n.locked }));
-        if (!this.float && !has_locked) {
-            nn = {x: 0, y: node.y, width: this.width, height: node.height};
-        }
-
-        while (true) {
-            var collision_node = _.find(this.nodes, _.bind(function(n) {
-                return n != node && Utils.is_intercepted(n, nn);
-            }, this));
-            if (typeof collision_node == 'undefined') {
-                return;
-            }
-            this.move_node(collision_node, collision_node.x, node.y + node.height,
-                collision_node.width, collision_node.height, true);
-        }
-    };
-
-    GridStackEngine.prototype.is_area_empty = function(x, y, width, height) {
-        var nn = {x: x || 0, y: y || 0, width: width || 1, height: height || 1};
-        var collision_node = _.find(this.nodes, _.bind(function(n) {
-            return Utils.is_intercepted(n, nn);
-        }, this));
-        return collision_node == null;
-    };
-
-    GridStackEngine.prototype._sort_nodes = function(dir) {
-        this.nodes = Utils.sort(this.nodes, dir, this.width);
-    };
-
-    GridStackEngine.prototype._pack_nodes = function() {
-        this._sort_nodes();
-
-        if (this.float) {
-            _.each(this.nodes, _.bind(function(n, i) {
-                if (n._updating || typeof n._orig_y == 'undefined' || n.y == n._orig_y)
-                    return;
-
-                var new_y = n.y;
-                while (new_y >= n._orig_y) {
-                    var collision_node = _.chain(this.nodes)
-                        .find(function(bn) {
-                            return n != bn &&
-                                Utils.is_intercepted({x: n.x, y: new_y, width: n.width, height: n.height}, bn);
-                        })
-                        .value();
-
-                    if (!collision_node) {
-                        n._dirty = true;
-                        n.y = new_y;
-                    }
-                    --new_y;
-                }
-            }, this));
-        }
-        else {
-            _.each(this.nodes, _.bind(function(n, i) {
-                if (n.locked)
-                    return;
-                while (n.y > 0) {
-                    var new_y = n.y - 1;
-                    var can_be_moved = i == 0;
-
-                    if (i > 0) {
-                        var collision_node = _.chain(this.nodes)
-                            .take(i)
-                            .find(function(bn) {
-                                return Utils.is_intercepted({x: n.x, y: new_y, width: n.width, height: n.height}, bn);
-                            })
-                            .value();
-                        can_be_moved = typeof collision_node == 'undefined';
-                    }
-
-                    if (!can_be_moved) {
-                        break;
-                    }
-                    n._dirty = n.y != new_y;
-                    n.y = new_y;
-                }
-            }, this));
-        }
-    };
-
-    GridStackEngine.prototype._prepare_node = function(node, resizing) {
-        node = _.defaults(node || {}, {width: 1, height: 1, x: 0, y: 0 });
-
-        node.x = parseInt('' + node.x);
-        node.y = parseInt('' + node.y);
-        node.width = parseInt('' + node.width);
-        node.height = parseInt('' + node.height);
-        node.auto_position = node.auto_position || false;
-        node.no_resize = node.no_resize || false;
-        node.no_move = node.no_move || false;
-
-        if (node.width > this.width) {
-            node.width = this.width;
-        }
-        else if (node.width < 1) {
-            node.width = 1;
-        }
-
-        if (node.height < 1) {
-            node.height = 1;
-        }
-
-        if (node.x < 0) {
-            node.x = 0;
-        }
-
-        if (node.x + node.width > this.width) {
-            if (resizing) {
-                node.width = this.width - node.x;
-            }
-            else {
-                node.x = this.width - node.width;
-            }
-        }
-
-        if (node.y < 0) {
-            node.y = 0;
-        }
-
-        return node;
-    };
-
-    GridStackEngine.prototype._notify = function() {
-        if (this._update_counter) {
-            return;
-        }
-        var deleted_nodes = Array.prototype.slice.call(arguments, 1).concat(this.get_dirty_nodes());
-        deleted_nodes = deleted_nodes.concat(this.get_dirty_nodes());
-        this.onchange(deleted_nodes);
-    };
-
-    GridStackEngine.prototype.clean_nodes = function() {
-        _.each(this.nodes, function(n) {n._dirty = false });
-    };
-
-    GridStackEngine.prototype.get_dirty_nodes = function() {
-        return _.filter(this.nodes, function(n) { return n._dirty; });
-    };
-
-    GridStackEngine.prototype.add_node = function(node) {
-        node = this._prepare_node(node);
-
-        if (typeof node.max_width != 'undefined') node.width = Math.min(node.width, node.max_width);
-        if (typeof node.max_height != 'undefined') node.height = Math.min(node.height, node.max_height);
-        if (typeof node.min_width != 'undefined') node.width = Math.max(node.width, node.min_width);
-        if (typeof node.min_height != 'undefined') node.height = Math.max(node.height, node.min_height);
-
-        node._id = ++id_seq;
-        node._dirty = true;
-
-        if (node.auto_position) {
-            this._sort_nodes();
-
-            for (var i = 0;; ++i) {
-                var x = i % this.width, y = Math.floor(i / this.width);
-                if (x + node.width > this.width) {
-                    continue;
-                }
-                if (!_.find(this.nodes, function(n) {
-                    return Utils.is_intercepted({x: x, y: y, width: node.width, height: node.height}, n);
-                })) {
-                    node.x = x;
-                    node.y = y;
-                    break;
-                }
-            }
-        }
-
-        this.nodes.push(node);
-
-        this._fix_collisions(node);
-        this._pack_nodes();
-        this._notify();
-        return node;
-    };
-
-    GridStackEngine.prototype.remove_node = function(node) {
-        node._id = null;
-        this.nodes = _.without(this.nodes, node);
-        this._pack_nodes();
-        this._notify(node);
-    };
-
-    GridStackEngine.prototype.can_move_node = function(node, x, y, width, height) {
-        var has_locked = Boolean(_.find(this.nodes, function(n) { return n.locked }));
-
-        if (!this.height && !has_locked)
-            return true;
-
-        var cloned_node;
-        var clone = new GridStackEngine(
-            this.width,
-            null,
-            this.float,
-            0,
-            _.map(this.nodes, function(n) {
-                if (n == node) {
-                    cloned_node = $.extend({}, n);
-                    return cloned_node;
-                }
-                return $.extend({}, n);
-            }));
-
-        clone.move_node(cloned_node, x, y, width, height);
-
-        var res = true;
-
-        if (has_locked)
-            res &= !Boolean(_.find(clone.nodes, function(n) {
-                return n != cloned_node && Boolean(n.locked) && Boolean(n._dirty);
-            }));
-        if (this.height)
-            res &= clone.get_grid_height() <= this.height;
-
-        return res;
-    };
-
-    GridStackEngine.prototype.can_be_placed_with_respect_to_height = function(node) {
-        if (!this.height)
-            return true;
-
-        var clone = new GridStackEngine(
-            this.width,
-            null,
-            this.float,
-            0,
-            _.map(this.nodes, function(n) { return $.extend({}, n) }));
-        clone.add_node(node);
-        return clone.get_grid_height() <= this.height;
-    };
-
-    GridStackEngine.prototype.move_node = function(node, x, y, width, height, no_pack) {
-        if (typeof x != 'number') x = node.x;
-        if (typeof y != 'number') y = node.y;
-        if (typeof width != 'number') width = node.width;
-        if (typeof height != 'number') height = node.height;
-
-        if (typeof node.max_width != 'undefined') width = Math.min(width, node.max_width);
-        if (typeof node.max_height != 'undefined') height = Math.min(height, node.max_height);
-        if (typeof node.min_width != 'undefined') width = Math.max(width, node.min_width);
-        if (typeof node.min_height != 'undefined') height = Math.max(height, node.min_height);
-
-        if (node.x == x && node.y == y && node.width == width && node.height == height) {
-            return node;
-        }
-
-        var resizing = node.width != width;
-        node._dirty = true;
-
-        node.x = x;
-        node.y = y;
-        node.width = width;
-        node.height = height;
-
-        node = this._prepare_node(node, resizing);
-
-        this._fix_collisions(node);
-        if (!no_pack) {
-            this._pack_nodes();
-            this._notify();
-        }
-        return node;
-    };
-
-    GridStackEngine.prototype.get_grid_height = function() {
-        return _.reduce(this.nodes, function(memo, n) { return Math.max(memo, n.y + n.height); }, 0);
-    };
-
-    GridStackEngine.prototype.begin_update = function(node) {
-        _.each(this.nodes, function(n) {
-            n._orig_y = n.y;
-        });
-        node._updating = true;
-    };
-
-    GridStackEngine.prototype.end_update = function() {
-        _.each(this.nodes, function(n) {
-            n._orig_y = n.y;
-        });
-        var n = _.find(this.nodes, function(n) { return n._updating; });
-        if (n) {
-            n._updating = false;
-        }
-    };
-
-    var GridStack = function(el, opts) {
-        var self = this, one_column_mode;
-
-        opts = opts || {};
-
-        this.container = $(el);
-
-        opts.item_class = opts.item_class || 'grid-stack-item';
-        var is_nested = this.container.closest('.' + opts.item_class).size() > 0;
-
-        this.opts = _.defaults(opts || {}, {
-            width: parseInt(this.container.attr('data-gs-width')) || 12,
-            height: parseInt(this.container.attr('data-gs-height')) || 0,
-            item_class: 'grid-stack-item',
-            placeholder_class: 'grid-stack-placeholder',
-            placeholder_text: '',
-            handle: '.grid-stack-item-content',
-            handle_class: null,
-            cell_height: 60,
-            vertical_margin: 20,
-            auto: true,
-            min_width: 768,
-            float: false,
-            static_grid: false,
-            _class: 'grid-stack-instance-' + (Math.random() * 10000).toFixed(0),
-            animate: Boolean(this.container.attr('data-gs-animate')) || false,
-            always_show_resize_handle: opts.always_show_resize_handle || false,
-            resizable: _.defaults(opts.resizable || {}, {
-                autoHide: !(opts.always_show_resize_handle || false),
-                handles: 'se'
-            }),
-            draggable: _.defaults(opts.draggable || {}, {
-                handle: (opts.handle_class ? '.' + opts.handle_class : (opts.handle ? opts.handle : '')) || '.grid-stack-item-content',
-                scroll: false,
-                appendTo: 'body'
-            })
-        });
-        this.opts.is_nested = is_nested;
-
-        this.container.addClass(this.opts._class);
-
-        this._set_static_class();
-
-        if (is_nested) {
-            this.container.addClass('grid-stack-nested');
-        }
-
-        this._init_styles();
-
-        this.grid = new GridStackEngine(this.opts.width, function(nodes) {
-            var max_height = 0;
-            _.each(nodes, function(n) {
-                if (n._id == null) {
-                    n.el.remove();
-                }
-                else {
-                    n.el
-                        .attr('data-gs-x', n.x)
-                        .attr('data-gs-y', n.y)
-                        .attr('data-gs-width', n.width)
-                        .attr('data-gs-height', n.height);
-                    max_height = Math.max(max_height, n.y + n.height);
-                }
-            });
-            self._update_styles(max_height + 10);
-        }, this.opts.float, this.opts.height);
-
-        if (this.opts.auto) {
-            var elements = [];
-            var _this = this;
-            this.container.children('.' + this.opts.item_class + ':not(.' + this.opts.placeholder_class + ')').each(function(index, el) {
-                el = $(el);
-                elements.push({
-                    el: el,
-                    i: parseInt(el.attr('data-gs-x')) + parseInt(el.attr('data-gs-y')) * _this.opts.width
-                });
-            });
-            _.chain(elements).sortBy(function(x) { return x.i; }).each(function(i) {
-                self._prepare_element(i.el);
-            }).value();
-        }
-
-        this.set_animation(this.opts.animate);
-
-        this.placeholder = $(
-            '<div class="' + this.opts.placeholder_class + ' ' + this.opts.item_class + '">' +
-            '<div class="placeholder-content">' + this.opts.placeholder_text + '</div></div>').hide();
-
-        this.container.height(
-            this.grid.get_grid_height() * (this.opts.cell_height + this.opts.vertical_margin) -
-            this.opts.vertical_margin);
-
-        this.on_resize_handler = function() {
-            if (self._is_one_column_mode()) {
-                if (one_column_mode)
-                    return;
-
-                one_column_mode = true;
-
-                self.grid._sort_nodes();
-                _.each(self.grid.nodes, function(node) {
-                    self.container.append(node.el);
-
-                    if (self.opts.static_grid) {
-                        return;
-                    }
-                    if (!node.no_move) {
-                        node.el.draggable('disable');
-                    }
-                    if (!node.no_resize) {
-                        node.el.resizable('disable');
-                    }
-                });
-            }
-            else {
-                if (!one_column_mode)
-                    return;
-
-                one_column_mode = false;
-
-                if (self.opts.static_grid) {
-                    return;
-                }
-
-                _.each(self.grid.nodes, function(node) {
-                    if (!node.no_move) {
-                        node.el.draggable('enable');
-                    }
-                    if (!node.no_resize) {
-                        node.el.resizable('enable');
-                    }
-                });
-            }
-        };
-
-        $(window).resize(this.on_resize_handler);
-        this.on_resize_handler();
-    };
-
-    GridStack.prototype._trigger_change_event = function(forceTrigger) {
-        var elements = this.grid.get_dirty_nodes();
-        var hasChanges = false;
-
-        var eventParams = [];
-        if (elements && elements.length) {
-            eventParams.push(elements);
-            hasChanges = true;
-        }
-
-        if (hasChanges || forceTrigger === true) {
-            this.container.trigger('change', eventParams);
-        }
-    };
-
-    GridStack.prototype._init_styles = function() {
-        if (this._styles_id) {
-            $('[data-gs-id="' + this._styles_id + '"]').remove();
-        }
-        this._styles_id = 'gridstack-style-' + (Math.random() * 100000).toFixed();
-        this._styles = Utils.create_stylesheet(this._styles_id);
-        if (this._styles != null)
-            this._styles._max = 0;
-    };
-
-    GridStack.prototype._update_styles = function(max_height) {
-        if (this._styles == null) {
-            return;
-        }
-
-        var prefix = '.' + this.opts._class + ' .' + this.opts.item_class;
-
-        if (typeof max_height == 'undefined') {
-            max_height = this._styles._max;
-            this._init_styles();
-            this._update_container_height();
-        }
-
-        if (this._styles._max == 0) {
-            Utils.insert_css_rule(this._styles, prefix, 'min-height: ' + (this.opts.cell_height) + 'px;', 0);
-        }
-
-        if (max_height > this._styles._max) {
-            for (var i = this._styles._max; i < max_height; ++i) {
-                Utils.insert_css_rule(this._styles,
-                    prefix + '[data-gs-height="' + (i + 1) + '"]',
-                    'height: ' + (this.opts.cell_height * (i + 1) + this.opts.vertical_margin * i) + 'px;',
-                    i
-                );
-                Utils.insert_css_rule(this._styles,
-                    prefix + '[data-gs-min-height="' + (i + 1) + '"]',
-                    'min-height: ' + (this.opts.cell_height * (i + 1) + this.opts.vertical_margin * i) + 'px;',
-                    i
-                );
-                Utils.insert_css_rule(this._styles,
-                    prefix + '[data-gs-max-height="' + (i + 1) + '"]',
-                    'max-height: ' + (this.opts.cell_height * (i + 1) + this.opts.vertical_margin * i) + 'px;',
-                    i
-                );
-                Utils.insert_css_rule(this._styles,
-                    prefix + '[data-gs-y="' + i + '"]',
-                    'top: ' + (this.opts.cell_height * i + this.opts.vertical_margin * i) + 'px;',
-                    i
-                );
-            }
-            this._styles._max = max_height;
-        }
-    };
-
-    GridStack.prototype._update_container_height = function() {
-        if (this.grid._update_counter) {
-            return;
-        }
-        this.container.height(
-            this.grid.get_grid_height() * (this.opts.cell_height + this.opts.vertical_margin) -
-            this.opts.vertical_margin);
-    };
-
-    GridStack.prototype._is_one_column_mode = function() {
-        return (window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth) <=
-            this.opts.min_width;
-    };
-
-    GridStack.prototype._prepare_element = function(el) {
-        var self = this;
-        el = $(el);
-
-        el.addClass(this.opts.item_class);
-
-        var node = self.grid.add_node({
-            x: el.attr('data-gs-x'),
-            y: el.attr('data-gs-y'),
-            width: el.attr('data-gs-width'),
-            height: el.attr('data-gs-height'),
-            max_width: el.attr('data-gs-max-width'),
-            min_width: el.attr('data-gs-min-width'),
-            max_height: el.attr('data-gs-max-height'),
-            min_height: el.attr('data-gs-min-height'),
-            auto_position: Utils.toBool(el.attr('data-gs-auto-position')),
-            no_resize: Utils.toBool(el.attr('data-gs-no-resize')),
-            no_move: Utils.toBool(el.attr('data-gs-no-move')),
-            locked: Utils.toBool(el.attr('data-gs-locked')),
-            el: el
-        });
-        el.data('_gridstack_node', node);
-
-        if (self.opts.static_grid) {
-            return;
-        }
-
-        var cell_width, cell_height;
-
-        var drag_or_resize = function(event, ui) {
-            var x = Math.round(ui.position.left / cell_width),
-                y = Math.floor((ui.position.top + cell_height / 2) / cell_height),
-                width, height;
-            if (event.type != "drag") {
-                width = Math.round(ui.size.width / cell_width);
-                height = Math.round(ui.size.height / cell_height);
-            }
-
-            if (!self.grid.can_move_node(node, x, y, width, height)) {
-                return;
-            }
-            self.grid.move_node(node, x, y, width, height);
-            self._update_container_height();
-        };
-
-        var on_start_moving = function(event, ui) {
-            self.container.append(self.placeholder);
-            var o = $(this);
-            self.grid.clean_nodes();
-            self.grid.begin_update(node);
-            cell_width = o.outerWidth() / o.attr('data-gs-width');
-            cell_height = self.opts.cell_height + self.opts.vertical_margin;
-            self.placeholder
-                .attr('data-gs-x', o.attr('data-gs-x'))
-                .attr('data-gs-y', o.attr('data-gs-y'))
-                .attr('data-gs-width', o.attr('data-gs-width'))
-                .attr('data-gs-height', o.attr('data-gs-height'))
-                .show();
-            node.el = self.placeholder;
-
-            el.resizable('option', 'minWidth', Math.round(cell_width * (node.min_width || 1)));
-            el.resizable('option', 'minHeight', self.opts.cell_height * (node.min_height || 1));
-
-            if (event.type == 'resizestart') {
-                o.find('.grid-stack-item').trigger('resizestart');
-            }
-        };
-
-        var on_end_moving = function(event, ui) {
-            self.placeholder.detach();
-            var o = $(this);
-            node.el = o;
-            self.placeholder.hide();
-            o
-                .attr('data-gs-x', node.x)
-                .attr('data-gs-y', node.y)
-                .attr('data-gs-width', node.width)
-                .attr('data-gs-height', node.height)
-                .removeAttr('style');
-            self._update_container_height();
-            self._trigger_change_event();
-
-            self.grid.end_update();
-
-            var nested_grids = o.find('.grid-stack');
-            if (nested_grids.length && event.type == 'resizestop') {
-                nested_grids.each(function(index, el) {
-                    $(el).data('gridstack').on_resize_handler();
-                });
-                o.find('.grid-stack-item').trigger('resizestop');
-            }
-        };
-
-        el
-            .draggable(_.extend(this.opts.draggable, {
-                containment: this.opts.is_nested ? this.container.parent() : null,
-                start: on_start_moving,
-                stop: on_end_moving,
-                drag: drag_or_resize
-            }))
-            .resizable(_.extend(this.opts.resizable, {
-                start: on_start_moving,
-                stop: on_end_moving,
-                resize: drag_or_resize
-            }));
-
-        if (node.no_move || this._is_one_column_mode()) {
-            el.draggable('disable');
-        }
-
-        if (node.no_resize || this._is_one_column_mode()) {
-            el.resizable('disable');
-        }
-
-        el.attr('data-gs-locked', node.locked ? 'yes' : null);
-    };
-
-    GridStack.prototype.set_animation = function(enable) {
-        if (enable) {
-            this.container.addClass('grid-stack-animate');
-        }
-        else {
-            this.container.removeClass('grid-stack-animate');
-        }
-    };
-
-    GridStack.prototype.add_widget = function(el, x, y, width, height, auto_position) {
-        el = $(el);
-        if (typeof x != 'undefined') el.attr('data-gs-x', x);
-        if (typeof y != 'undefined') el.attr('data-gs-y', y);
-        if (typeof width != 'undefined') el.attr('data-gs-width', width);
-        if (typeof height != 'undefined') el.attr('data-gs-height', height);
-        if (typeof auto_position != 'undefined') el.attr('data-gs-auto-position', auto_position ? 'yes' : null);
-        this.container.append(el);
-        this._prepare_element(el);
-        this._update_container_height();
-        this._trigger_change_event(true);
-
-        return el;
-    };
-
-    GridStack.prototype.make_widget = function(el) {
-        el = $(el);
-        this._prepare_element(el);
-        this._update_container_height();
-        this._trigger_change_event(true);
-
-        return el;
-    };
-
-    GridStack.prototype.will_it_fit = function(x, y, width, height, auto_position) {
-        var node = {x: x, y: y, width: width, height: height, auto_position: auto_position};
-        return this.grid.can_be_placed_with_respect_to_height(node);
-    };
-
-    GridStack.prototype.remove_widget = function(el, detach_node) {
-        detach_node = typeof detach_node === 'undefined' ? true : detach_node;
-        el = $(el);
-        var node = el.data('_gridstack_node');
-        this.grid.remove_node(node);
-        el.removeData('_gridstack_node');
-        this._update_container_height();
-        if (detach_node)
-            el.remove();
-        this._trigger_change_event(true);
-    };
-
-    GridStack.prototype.remove_all = function(detach_node) {
-        _.each(this.grid.nodes, _.bind(function(node) {
-            this.remove_widget(node.el, detach_node);
-        }, this));
-        this.grid.nodes = [];
-        this._update_container_height();
-    };
-
-    GridStack.prototype.destroy = function() {
-        $(window).off("resize", this.on_resize_handler);
-        this.disable();
-        this.container.remove();
-        Utils.remove_stylesheet(this._styles_id);
-        if (this.grid)
-            this.grid = null;
-    };
-
-    GridStack.prototype.resizable = function(el, val) {
-        var self = this;
-        el = $(el);
-        el.each(function(index, el) {
-            el = $(el);
-            var node = el.data('_gridstack_node');
-            if (typeof node == 'undefined' || node == null) {
-                return;
-            }
-
-            node.no_resize = !(val || false);
-            if (node.no_resize || self._is_one_column_mode()) {
-                el.resizable('disable');
-            }
-            else {
-                el.resizable('enable');
-            }
-        });
-        return this;
-    };
-
-    GridStack.prototype.movable = function(el, val) {
-        var self = this;
-        el = $(el);
-        el.each(function(index, el) {
-            el = $(el);
-            var node = el.data('_gridstack_node');
-            if (typeof node == 'undefined' || node == null) {
-                return;
-            }
-
-            node.no_move = !(val || false);
-            if (node.no_move || self._is_one_column_mode()) {
-                el.draggable('disable');
-                el.removeClass('ui-draggable-handle');
-            }
-            else {
-                el.draggable('enable');
-                el.addClass('ui-draggable-handle');
-            }
-        });
-        return this;
-    };
-
-    GridStack.prototype.disable = function() {
-        this.movable(this.container.children('.' + this.opts.item_class), false);
-        this.resizable(this.container.children('.' + this.opts.item_class), false);
-        this.container.trigger('disable');
-    };
-
-    GridStack.prototype.enable = function() {
-        this.movable(this.container.children('.' + this.opts.item_class), true);
-        this.resizable(this.container.children('.' + this.opts.item_class), true);
-        this.container.trigger('enable');
-    };
-
-    GridStack.prototype.locked = function(el, val) {
-        el = $(el);
-        el.each(function(index, el) {
-            el = $(el);
-            var node = el.data('_gridstack_node');
-            if (typeof node == 'undefined' || node == null) {
-                return;
-            }
-
-            node.locked = (val || false);
-            el.attr('data-gs-locked', node.locked ? 'yes' : null);
-        });
-        return this;
-    };
-
-	GridStack.prototype.min_height = function (el, val) {
+	var scope = window;
+
+	var obsolete = function(f, oldName, newName) {
+		var wrapper = function() {
+			console.warn('gridstack.js: Function `' + oldName + '` is deprecated as of v0.2.5 and has been replaced with `' +
+				newName + '`. It will be **completely** removed in v1.0.');
+			return f.apply(this, arguments);
+		};
+		wrapper.prototype = f.prototype;
+
+		return wrapper;
+	};
+
+	var obsoleteOpts = function(oldName, newName) {
+		console.warn('gridstack.js: Option `' + oldName + '` is deprecated as of v0.2.5 and has been replaced with `' +
+			newName + '`. It will be **completely** removed in v1.0.');
+	};
+
+	var Utils = {
+		isIntercepted: function(a, b) {
+			return !(a.x + a.width <= b.x || b.x + b.width <= a.x || a.y + a.height <= b.y || b.y + b.height <= a.y);
+		},
+
+		sort: function(nodes, dir, width) {
+			width = width || _.chain(nodes).map(function(node) { return node.x + node.width; }).max().value();
+			dir = dir != -1 ? 1 : -1;
+			return _.sortBy(nodes, function(n) { return dir * (n.x + n.y * width); });
+		},
+
+		createStylesheet: function(id) {
+			var style = document.createElement('style');
+			style.setAttribute('type', 'text/css');
+			style.setAttribute('data-gs-id', id);
+			if (style.styleSheet) {
+				style.styleSheet.cssText = '';
+			} else {
+				style.appendChild(document.createTextNode(''));
+			}
+			document.getElementsByTagName('head')[0].appendChild(style);
+			return style.sheet;
+		},
+
+		removeStylesheet: function(id) {
+			$('STYLE[data-gs-id=' + id + ']').remove();
+		},
+
+		insertCSSRule: function(sheet, selector, rules, index) {
+			if (typeof sheet.insertRule === 'function') {
+				sheet.insertRule(selector + '{' + rules + '}', index);
+			} else if (typeof sheet.addRule === 'function') {
+				sheet.addRule(selector, rules, index);
+			}
+		},
+
+		toBool: function(v) {
+			if (typeof v == 'boolean') {
+				return v;
+			}
+			if (typeof v == 'string') {
+				v = v.toLowerCase();
+				return !(v === '' || v == 'no' || v == 'false' || v == '0');
+			}
+			return Boolean(v);
+		},
+
+		_collisionNodeCheck: function(n) {
+			return n != this.node && Utils.isIntercepted(n, this.nn);
+		},
+
+		_didCollideFloat: function(bn) {
+			return this.n != bn &&
+				Utils.isIntercepted({x: this.n.x, y: this.newY, width: this.n.width, height: this.n.height}, bn);
+		},
+
+		_didCollide: function(bn) {
+			return Utils.isIntercepted({x: this.n.x, y: this.newY, width: this.n.width, height: this.n.height}, bn);
+		},
+
+		_isAddNodeIntercepted: function(n) {
+			return Utils.isIntercepted({x: this.x, y: this.y, width: this.node.width, height: this.node.height}, n);
+		}
+	};
+
+	// jscs:disable requireCamelCaseOrUpperCaseIdentifiers
+	Utils.is_intercepted = obsolete(Utils.isIntercepted, 'is_intercepted', 'isIntercepted');
+
+	Utils.create_stylesheet = obsolete(Utils.createStylesheet, 'create_stylesheet', 'createStylesheet');
+
+	Utils.remove_stylesheet = obsolete(Utils.removeStylesheet, 'remove_stylesheet', 'removeStylesheet');
+
+	Utils.insert_css_rule = obsolete(Utils.insertCSSRule, 'insert_css_rule', 'insertCSSRule');
+	// jscs:enable requireCamelCaseOrUpperCaseIdentifiers
+
+	var idSeq = 0;
+
+	var GridStackEngine = function(width, onchange, floatMode, height, items) {
+		this.width = width;
+		this.float = floatMode || false;
+		this.height = height || 0;
+
+		this.nodes = items || [];
+		this.onchange = onchange || function() {};
+
+		this._updateCounter = 0;
+		this._float = this.float;
+	};
+
+	GridStackEngine.prototype.batchUpdate = function() {
+		this._updateCounter = 1;
+		this.float = true;
+	};
+
+	GridStackEngine.prototype.commit = function() {
+		this._updateCounter = 0;
+		if (this._updateCounter === 0) {
+			this.float = this._float;
+			this._packNodes();
+			this._notify();
+		}
+	};
+
+	GridStackEngine.prototype._fixCollisions = function(node) {
+		var self = this;
+		this._sortNodes(-1);
+
+		var nn = node;
+		var hasLocked = Boolean(_.find(this.nodes, function(n) { return n.locked; }));
+		if (!this.float && !hasLocked) {
+			nn = {x: 0, y: node.y, width: this.width, height: node.height};
+		}
+		while (true) {
+			var collisionNode = _.find(this.nodes, _.bind(Utils._collisionNodeCheck, {node: node, nn: nn}));
+			if (typeof collisionNode == 'undefined') {
+				return;
+			}
+			this.moveNode(collisionNode, collisionNode.x, node.y + node.height,
+				collisionNode.width, collisionNode.height, true);
+		}
+	};
+
+	GridStackEngine.prototype.isAreaEmpty = function(x, y, width, height) {
+		var nn = {x: x || 0, y: y || 0, width: width || 1, height: height || 1};
+		var collisionNode = _.find(this.nodes, _.bind(function(n) {
+			return Utils.isIntercepted(n, nn);
+		}, this));
+		return collisionNode === null;
+	};
+
+	GridStackEngine.prototype._sortNodes = function(dir) {
+		this.nodes = Utils.sort(this.nodes, dir, this.width);
+	};
+
+	GridStackEngine.prototype._packNodes = function() {
+		this._sortNodes();
+
+		if (this.float) {
+			_.each(this.nodes, _.bind(function(n, i) {
+				if (n._updating || typeof n._origY == 'undefined' || n.y == n._origY) {
+					return;
+				}
+
+				var newY = n.y;
+				while (newY >= n._origY) {
+					var collisionNode = _.chain(this.nodes)
+						.find(_.bind(Utils._didCollide, {n: n, newY: newY}))
+						.value();
+
+					if (!collisionNode) {
+						n._dirty = true;
+						n.y = newY;
+					}
+					--newY;
+				}
+			}, this));
+		} else {
+			_.each(this.nodes, _.bind(function(n, i) {
+				if (n.locked) {
+					return;
+				}
+				while (n.y > 0) {
+					var newY = n.y - 1;
+					var canBeMoved = i === 0;
+
+					if (i > 0) {
+						var collisionNode = _.chain(this.nodes)
+							.take(i)
+							.find(_.bind(Utils._didCollide, {n: n, newY: newY}))
+							.value();
+						canBeMoved = typeof collisionNode == 'undefined';
+					}
+
+					if (!canBeMoved) {
+						break;
+					}
+					n._dirty = n.y != newY;
+					n.y = newY;
+				}
+			}, this));
+		}
+	};
+
+	GridStackEngine.prototype._prepareNode = function(node, resizing) {
+		node = _.defaults(node || {}, {width: 1, height: 1, x: 0, y: 0});
+
+		node.x = parseInt('' + node.x);
+		node.y = parseInt('' + node.y);
+		node.width = parseInt('' + node.width);
+		node.height = parseInt('' + node.height);
+		node.autoPosition = node.autoPosition || false;
+		node.noResize = node.noResize || false;
+		node.noMove = node.noMove || false;
+
+		if (node.width > this.width) {
+			node.width = this.width;
+		} else if (node.width < 1) {
+			node.width = 1;
+		}
+
+		if (node.height < 1) {
+			node.height = 1;
+		}
+
+		if (node.x < 0) {
+			node.x = 0;
+		}
+
+		if (node.x + node.width > this.width) {
+			if (resizing) {
+				node.width = this.width - node.x;
+			} else {
+				node.x = this.width - node.width;
+			}
+		}
+
+		if (node.y < 0) {
+			node.y = 0;
+		}
+
+		return node;
+	};
+
+	GridStackEngine.prototype._notify = function() {
+		if (this._updateCounter) {
+			return;
+		}
+		var deletedNodes = Array.prototype.slice.call(arguments, 1).concat(this.getDirtyNodes());
+		deletedNodes = deletedNodes.concat(this.getDirtyNodes());
+		this.onchange(deletedNodes);
+	};
+
+	GridStackEngine.prototype.cleanNodes = function() {
+		_.each(this.nodes, function(n) {n._dirty = false; });
+	};
+
+	GridStackEngine.prototype.getDirtyNodes = function() {
+		return _.filter(this.nodes, function(n) { return n._dirty; });
+	};
+
+	GridStackEngine.prototype.addNode = function(node) {
+		node = this._prepareNode(node);
+
+		if (typeof node.maxWidth != 'undefined') { node.width = Math.min(node.width, node.maxWidth); }
+		if (typeof node.maxHeight != 'undefined') { node.height = Math.min(node.height, node.maxHeight); }
+		if (typeof node.minWidth != 'undefined') { node.width = Math.max(node.width, node.minWidth); }
+		if (typeof node.minHeight != 'undefined') { node.height = Math.max(node.height, node.minHeight); }
+
+		node._id = ++idSeq;
+		node._dirty = true;
+
+		if (node.autoPosition) {
+			this._sortNodes();
+
+			for (var i = 0;; ++i) {
+				var x = i % this.width;
+				var y = Math.floor(i / this.width);
+				if (x + node.width > this.width) {
+					continue;
+				}
+				if (!_.find(this.nodes, _.bind(Utils._isAddNodeIntercepted, {x: x, y: y, node: node}))) {
+					node.x = x;
+					node.y = y;
+					break;
+				}
+			}
+		}
+
+		this.nodes.push(node);
+
+		this._fixCollisions(node);
+		this._packNodes();
+		this._notify();
+		return node;
+	};
+
+	GridStackEngine.prototype.removeNode = function(node) {
+		node._id = null;
+		this.nodes = _.without(this.nodes, node);
+		this._packNodes();
+		this._notify(node);
+	};
+
+	GridStackEngine.prototype.canMoveNode = function(node, x, y, width, height) {
+		var hasLocked = Boolean(_.find(this.nodes, function(n) { return n.locked; }));
+
+		if (!this.height && !hasLocked) {
+			return true;
+		}
+
+		var clonedNode;
+		var clone = new GridStackEngine(
+			this.width,
+			null,
+			this.float,
+			0,
+			_.map(this.nodes, function(n) {
+				if (n == node) {
+					clonedNode = $.extend({}, n);
+					return clonedNode;
+				}
+				return $.extend({}, n);
+			}));
+
+		clone.moveNode(clonedNode, x, y, width, height);
+
+		var res = true;
+
+		if (hasLocked) {
+			res &= !Boolean(_.find(clone.nodes, function(n) {
+				return n != clonedNode && Boolean(n.locked) && Boolean(n._dirty);
+			}));
+		}
+		if (this.height) {
+			res &= clone.getGridHeight() <= this.height;
+		}
+
+		return res;
+	};
+
+	GridStackEngine.prototype.canBePlacedWithRespectToHeight = function(node) {
+		if (!this.height) {
+			return true;
+		}
+
+		var clone = new GridStackEngine(
+			this.width,
+			null,
+			this.float,
+			0,
+			_.map(this.nodes, function(n) { return $.extend({}, n); }));
+		clone.addNode(node);
+		return clone.getGridHeight() <= this.height;
+	};
+
+	GridStackEngine.prototype.moveNode = function(node, x, y, width, height, noPack) {
+		if (typeof x != 'number') { x = node.x; }
+		if (typeof y != 'number') { y = node.y; }
+		if (typeof width != 'number') { width = node.width; }
+		if (typeof height != 'number') { height = node.height; }
+
+		if (typeof node.maxWidth != 'undefined') { width = Math.min(width, node.maxWidth); }
+		if (typeof node.maxHeight != 'undefined') { height = Math.min(height, node.maxHeight); }
+		if (typeof node.minWidth != 'undefined') { width = Math.max(width, node.minWidth); }
+		if (typeof node.minHeight != 'undefined') { height = Math.max(height, node.minHeight); }
+
+		if (node.x == x && node.y == y && node.width == width && node.height == height) {
+			return node;
+		}
+
+		var resizing = node.width != width;
+		node._dirty = true;
+
+		node.x = x;
+		node.y = y;
+		node.width = width;
+		node.height = height;
+
+		node = this._prepareNode(node, resizing);
+
+		this._fixCollisions(node);
+		if (!noPack) {
+			this._packNodes();
+			this._notify();
+		}
+		return node;
+	};
+
+	GridStackEngine.prototype.getGridHeight = function() {
+		return _.reduce(this.nodes, function(memo, n) { return Math.max(memo, n.y + n.height); }, 0);
+	};
+
+	GridStackEngine.prototype.beginUpdate = function(node) {
+		_.each(this.nodes, function(n) {
+			n._origY = n.y;
+		});
+		node._updating = true;
+	};
+
+	GridStackEngine.prototype.endUpdate = function() {
+		_.each(this.nodes, function(n) {
+			n._origY = n.y;
+		});
+		var n = _.find(this.nodes, function(n) { return n._updating; });
+		if (n) {
+			n._updating = false;
+		}
+	};
+
+	var GridStack = function(el, opts) {
+		var self = this;
+		var oneColumnMode;
+
+		opts = opts || {};
+
+		this.container = $(el);
+
+		// jscs:disable requireCamelCaseOrUpperCaseIdentifiers
+		if (typeof opts.handle_class !== 'undefined') {
+			opts.handleClass = opts.handle_class;
+			obsoleteOpts('handle_class', 'handleClass');
+		}
+		if (typeof opts.item_class !== 'undefined') {
+			opts.itemClass = opts.item_class;
+			obsoleteOpts('item_class', 'itemClass');
+		}
+		if (typeof opts.placeholder_class !== 'undefined') {
+			opts.placeholderClass = opts.placeholder_class;
+			obsoleteOpts('placeholder_class', 'placeholderClass');
+		}
+		if (typeof opts.placeholder_text !== 'undefined') {
+			opts.placeholderText = opts.placeholder_text;
+			obsoleteOpts('placeholder_text', 'placeholderText');
+		}
+		if (typeof opts.item_class !== 'undefined') {
+			opts.itemClass = opts.item_class;
+			obsoleteOpts('item_class', 'itemClass');
+		}
+		if (typeof opts.cell_height !== 'undefined') {
+			opts.cellHeight = opts.cell_height;
+			obsoleteOpts('cell_height', 'cellHeight');
+		}
+		if (typeof opts.vertical_margin !== 'undefined') {
+			opts.verticalMargin = opts.vertical_margin;
+			obsoleteOpts('vertical_margin', 'verticalMargin');
+		}
+		if (typeof opts.min_width !== 'undefined') {
+			opts.minWidth = opts.min_width;
+			obsoleteOpts('min_width', 'minWidth');
+		}
+		if (typeof opts.static_grid !== 'undefined') {
+			opts.staticGrid = opts.static_grid;
+			obsoleteOpts('static_grid', 'staticGrid');
+		}
+		if (typeof opts.is_nested !== 'undefined') {
+			opts.isNested = opts.is_nested;
+			obsoleteOpts('is_nested', 'isNested');
+		}
+		if (typeof opts.always_show_resize_handle !== 'undefined') {
+			opts.alwaysShowResizeHandle = opts.always_show_resize_handle;
+			obsoleteOpts('always_show_resize_handle', 'alwaysShowResizeHandle');
+		}
+		// jscs:enable requireCamelCaseOrUpperCaseIdentifiers
+
+		opts.itemClass = opts.itemClass || 'grid-stack-item';
+		var isNested = this.container.closest('.' + opts.itemClass).size() > 0;
+
+		this.opts = _.defaults(opts || {}, {
+			width: parseInt(this.container.attr('data-gs-width')) || 12,
+			height: parseInt(this.container.attr('data-gs-height')) || 0,
+			itemClass: 'grid-stack-item',
+			placeholderClass: 'grid-stack-placeholder',
+			placeholderText: '',
+			handle: '.grid-stack-item-content',
+			handleClass: null,
+			cellHeight: 60,
+			verticalMargin: 20,
+			auto: true,
+			minWidth: 768,
+			float: false,
+			staticGrid: false,
+			_class: 'grid-stack-instance-' + (Math.random() * 10000).toFixed(0),
+			animate: Boolean(this.container.attr('data-gs-animate')) || false,
+			alwaysShowResizeHandle: opts.alwaysShowResizeHandle || false,
+			resizable: _.defaults(opts.resizable || {}, {
+				autoHide: !(opts.alwaysShowResizeHandle || false),
+				handles: 'se'
+			}),
+			draggable: _.defaults(opts.draggable || {}, {
+				handle: (opts.handleClass ? '.' + opts.handleClass : (opts.handle ? opts.handle : '')) ||
+					'.grid-stack-item-content',
+				scroll: false,
+				appendTo: 'body'
+			})
+		});
+		this.opts.isNested = isNested;
+
+		this.container.addClass(this.opts._class);
+
+		this._setStaticClass();
+
+		if (isNested) {
+			this.container.addClass('grid-stack-nested');
+		}
+
+		this._initStyles();
+
+		this.grid = new GridStackEngine(this.opts.width, function(nodes) {
+			var maxHeight = 0;
+			_.each(nodes, function(n) {
+				if (n._id === null) {
+					n.el.remove();
+				} else {
+					n.el
+						.attr('data-gs-x', n.x)
+						.attr('data-gs-y', n.y)
+						.attr('data-gs-width', n.width)
+						.attr('data-gs-height', n.height);
+					maxHeight = Math.max(maxHeight, n.y + n.height);
+				}
+			});
+			self._updateStyles(maxHeight + 10);
+		}, this.opts.float, this.opts.height);
+
+		if (this.opts.auto) {
+			var elements = [];
+			var _this = this;
+			this.container.children('.' + this.opts.itemClass + ':not(.' + this.opts.placeholderClass + ')')
+				.each(function(index, el) {
+				el = $(el);
+				elements.push({
+					el: el,
+					i: parseInt(el.attr('data-gs-x')) + parseInt(el.attr('data-gs-y')) * _this.opts.width
+				});
+			});
+			_.chain(elements).sortBy(function(x) { return x.i; }).each(function(i) {
+				self._prepareElement(i.el);
+			}).value();
+		}
+
+		this.setAnimation(this.opts.animate);
+
+		this.placeholder = $(
+			'<div class="' + this.opts.placeholderClass + ' ' + this.opts.itemClass + '">' +
+			'<div class="placeholder-content">' + this.opts.placeholderText + '</div></div>').hide();
+
+		this.container.height(
+			this.grid.getGridHeight() * (this.opts.cellHeight + this.opts.verticalMargin) -
+			this.opts.verticalMargin);
+
+		this.onResizeHandler = function() {
+			if (self._isOneColumnMode()) {
+				if (oneColumnMode) {
+					return;
+				}
+
+				oneColumnMode = true;
+
+				self.grid._sortNodes();
+				_.each(self.grid.nodes, function(node) {
+					self.container.append(node.el);
+
+					if (self.opts.staticGrid) {
+						return;
+					}
+					if (!node.noMove) {
+						node.el.draggable('disable');
+					}
+					if (!node.noResize) {
+						node.el.resizable('disable');
+					}
+				});
+			} else {
+				if (!oneColumnMode) {
+					return;
+				}
+
+				oneColumnMode = false;
+
+				if (self.opts.staticGrid) {
+					return;
+				}
+
+				_.each(self.grid.nodes, function(node) {
+					if (!node.noMove) {
+						node.el.draggable('enable');
+					}
+					if (!node.noResize) {
+						node.el.resizable('enable');
+					}
+				});
+			}
+		};
+
+		$(window).resize(this.onResizeHandler);
+		this.onResizeHandler();
+	};
+
+	GridStack.prototype._triggerChangeEvent = function(forceTrigger) {
+		var elements = this.grid.getDirtyNodes();
+		var hasChanges = false;
+
+		var eventParams = [];
+		if (elements && elements.length) {
+			eventParams.push(elements);
+			hasChanges = true;
+		}
+
+		if (hasChanges || forceTrigger === true) {
+			this.container.trigger('change', eventParams);
+		}
+	};
+
+	GridStack.prototype._initStyles = function() {
+		if (this._stylesId) {
+			$('[data-gs-id="' + this._stylesId + '"]').remove();
+		}
+		this._stylesId = 'gridstack-style-' + (Math.random() * 100000).toFixed();
+		this._styles = Utils.createStylesheet(this._stylesId);
+		if (this._styles != null) {
+			this._styles._max = 0;
+		}
+	};
+
+	GridStack.prototype._updateStyles = function(maxHeight) {
+		if (this._styles === null) {
+			return;
+		}
+
+		var prefix = '.' + this.opts._class + ' .' + this.opts.itemClass;
+
+		if (typeof maxHeight == 'undefined') {
+			maxHeight = this._styles._max;
+			this._initStyles();
+			this._updateContainerHeight();
+		}
+
+		if (this._styles._max === 0) {
+			Utils.insertCSSRule(this._styles, prefix, 'min-height: ' + (this.opts.cellHeight) + 'px;', 0);
+		}
+
+		if (maxHeight > this._styles._max) {
+			for (var i = this._styles._max; i < maxHeight; ++i) {
+				Utils.insertCSSRule(this._styles,
+					prefix + '[data-gs-height="' + (i + 1) + '"]',
+					'height: ' + (this.opts.cellHeight * (i + 1) + this.opts.verticalMargin * i) + 'px;',
+					i
+				);
+				Utils.insertCSSRule(this._styles,
+					prefix + '[data-gs-min-height="' + (i + 1) + '"]',
+					'min-height: ' + (this.opts.cellHeight * (i + 1) + this.opts.verticalMargin * i) + 'px;',
+					i
+				);
+				Utils.insertCSSRule(this._styles,
+					prefix + '[data-gs-max-height="' + (i + 1) + '"]',
+					'max-height: ' + (this.opts.cellHeight * (i + 1) + this.opts.verticalMargin * i) + 'px;',
+					i
+				);
+				Utils.insertCSSRule(this._styles,
+					prefix + '[data-gs-y="' + i + '"]',
+					'top: ' + (this.opts.cellHeight * i + this.opts.verticalMargin * i) + 'px;',
+					i
+				);
+			}
+			this._styles._max = maxHeight;
+		}
+	};
+
+	GridStack.prototype._updateContainerHeight = function() {
+		if (this.grid._updateCounter) {
+			return;
+		}
+		this.container.height(
+			this.grid.getGridHeight() * (this.opts.cellHeight + this.opts.verticalMargin) -
+			this.opts.verticalMargin);
+	};
+
+	GridStack.prototype._isOneColumnMode = function() {
+		return (window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth) <=
+			this.opts.minWidth;
+	};
+
+	GridStack.prototype._prepareElement = function(el) {
+		var self = this;
 		el = $(el);
-		el.each(function (index, el) {
+
+		el.addClass(this.opts.itemClass);
+		var node = self.grid.addNode({
+			x: el.attr('data-gs-x'),
+			y: el.attr('data-gs-y'),
+			width: el.attr('data-gs-width'),
+			height: el.attr('data-gs-height'),
+			maxWidth: el.attr('data-gs-max-width'),
+			minWidth: el.attr('data-gs-min-width'),
+			maxHeight: el.attr('data-gs-max-height'),
+			minHeight: el.attr('data-gs-min-height'),
+			autoPosition: Utils.toBool(el.attr('data-gs-auto-position')),
+			noResize: Utils.toBool(el.attr('data-gs-no-resize')),
+			noMove: Utils.toBool(el.attr('data-gs-no-move')),
+			locked: Utils.toBool(el.attr('data-gs-locked')),
+			el: el
+		});
+		el.data('_gridstack_node', node);
+
+		if (self.opts.staticGrid) {
+			return;
+		}
+
+		var cellWidth;
+		var cellHeight;
+
+		var dragOrResize = function(event, ui) {
+			var x = Math.round(ui.position.left / cellWidth);
+			var y = Math.floor((ui.position.top + cellHeight / 2) / cellHeight);
+			var width;
+			var height;
+			if (event.type != 'drag') {
+				width = Math.round(ui.size.width / cellWidth);
+				height = Math.round(ui.size.height / cellHeight);
+			}
+
+			if (!self.grid.canMoveNode(node, x, y, width, height)) {
+				return;
+			}
+			self.grid.moveNode(node, x, y, width, height);
+			self._updateContainerHeight();
+		};
+
+		var onStartMoving = function(event, ui) {
+			self.container.append(self.placeholder);
+			var o = $(this);
+			self.grid.cleanNodes();
+			self.grid.beginUpdate(node);
+			cellWidth = o.outerWidth() / o.attr('data-gs-width');
+			cellHeight = self.opts.cellHeight + self.opts.verticalMargin;
+			self.placeholder
+				.attr('data-gs-x', o.attr('data-gs-x'))
+				.attr('data-gs-y', o.attr('data-gs-y'))
+				.attr('data-gs-width', o.attr('data-gs-width'))
+				.attr('data-gs-height', o.attr('data-gs-height'))
+				.show();
+			node.el = self.placeholder;
+
+			el.resizable('option', 'minWidth', Math.round(cellWidth * (node.minWidth || 1)));
+			el.resizable('option', 'minHeight', self.opts.cellHeight * (node.minHeight || 1));
+
+			if (event.type == 'resizestart') {
+				o.find('.grid-stack-item').trigger('resizestart');
+			}
+		};
+
+		var onEndMoving = function(event, ui) {
+			self.placeholder.detach();
+			var o = $(this);
+			node.el = o;
+			self.placeholder.hide();
+			o
+				.attr('data-gs-x', node.x)
+				.attr('data-gs-y', node.y)
+				.attr('data-gs-width', node.width)
+				.attr('data-gs-height', node.height)
+				.removeAttr('style');
+			self._updateContainerHeight();
+			self._triggerChangeEvent();
+
+			self.grid.endUpdate();
+
+			var nestedGrids = o.find('.grid-stack');
+			if (nestedGrids.length && event.type == 'resizestop') {
+				nestedGrids.each(function(index, el) {
+					$(el).data('gridstack').onResizeHandler();
+				});
+				o.find('.grid-stack-item').trigger('resizestop');
+			}
+		};
+
+		el
+			.draggable(_.extend(this.opts.draggable, {
+				containment: this.opts.isNested ? this.container.parent() : null,
+				start: onStartMoving,
+				stop: onEndMoving,
+				drag: dragOrResize
+			}))
+			.resizable(_.extend(this.opts.resizable, {
+				start: onStartMoving,
+				stop: onEndMoving,
+				resize: dragOrResize
+			}));
+
+		if (node.noMove || this._isOneColumnMode()) {
+			el.draggable('disable');
+		}
+
+		if (node.noResize || this._isOneColumnMode()) {
+			el.resizable('disable');
+		}
+
+		el.attr('data-gs-locked', node.locked ? 'yes' : null);
+	};
+
+	GridStack.prototype.setAnimation = function(enable) {
+		if (enable) {
+			this.container.addClass('grid-stack-animate');
+		} else {
+			this.container.removeClass('grid-stack-animate');
+		}
+	};
+
+	GridStack.prototype.addWidget = function(el, x, y, width, height, autoPosition) {
+		el = $(el);
+		if (typeof x != 'undefined') { el.attr('data-gs-x', x); }
+		if (typeof y != 'undefined') { el.attr('data-gs-y', y); }
+		if (typeof width != 'undefined') { el.attr('data-gs-width', width); }
+		if (typeof height != 'undefined') { el.attr('data-gs-height', height); }
+		if (typeof autoPosition != 'undefined') { el.attr('data-gs-auto-position', autoPosition ? 'yes' : null); }
+		this.container.append(el);
+		this._prepareElement(el);
+		this._updateContainerHeight();
+		this._triggerChangeEvent(true);
+
+		return el;
+	};
+
+	GridStack.prototype.makeWidget = function(el) {
+		el = $(el);
+		this._prepareElement(el);
+		this._updateContainerHeight();
+		this._triggerChangeEvent(true);
+
+		return el;
+	};
+
+	GridStack.prototype.willItFit = function(x, y, width, height, autoPosition) {
+		var node = {x: x, y: y, width: width, height: height, autoPosition: autoPosition};
+		return this.grid.canBePlacedWithRespectToHeight(node);
+	};
+
+	GridStack.prototype.removeWidget = function(el, detachNode) {
+		detachNode = typeof detachNode === 'undefined' ? true : detachNode;
+		el = $(el);
+		var node = el.data('_gridstack_node');
+		this.grid.removeNode(node);
+		el.removeData('_gridstack_node');
+		this._updateContainerHeight();
+		if (detachNode) {
+			el.remove();
+		}
+		this._triggerChangeEvent(true);
+	};
+
+	GridStack.prototype.removeAll = function(detachNode) {
+		_.each(this.grid.nodes, _.bind(function(node) {
+			this.removeWidget(node.el, detachNode);
+		}, this));
+		this.grid.nodes = [];
+		this._updateContainerHeight();
+	};
+
+	GridStack.prototype.destroy = function() {
+		$(window).off('resize', this.onResizeHandler);
+		this.disable();
+		this.container.remove();
+		Utils.removeStylesheet(this._stylesId);
+		if (this.grid) {
+			this.grid = null;
+		}
+	};
+
+	GridStack.prototype.resizable = function(el, val) {
+		var self = this;
+		el = $(el);
+		el.each(function(index, el) {
 			el = $(el);
 			var node = el.data('_gridstack_node');
-			if (typeof node == 'undefined' || node == null) {
+			if (typeof node == 'undefined' || node === null) {
 				return;
 			}
 
-			if(!isNaN(val)){
-				node.min_height = (val || false);
+			node.noResize = !(val || false);
+			if (node.noResize || self._isOneColumnMode()) {
+				el.resizable('disable');
+			} else {
+				el.resizable('enable');
+			}
+		});
+		return this;
+	};
+
+	GridStack.prototype.movable = function(el, val) {
+		var self = this;
+		el = $(el);
+		el.each(function(index, el) {
+			el = $(el);
+			var node = el.data('_gridstack_node');
+			if (typeof node == 'undefined' || node === null) {
+				return;
+			}
+
+			node.noMove = !(val || false);
+			if (node.noMove || self._isOneColumnMode()) {
+				el.draggable('disable');
+				el.removeClass('ui-draggable-handle');
+			} else {
+				el.draggable('enable');
+				el.addClass('ui-draggable-handle');
+			}
+		});
+		return this;
+	};
+
+	GridStack.prototype.disable = function() {
+		this.movable(this.container.children('.' + this.opts.itemClass), false);
+		this.resizable(this.container.children('.' + this.opts.itemClass), false);
+		this.container.trigger('disable');
+	};
+
+	GridStack.prototype.enable = function() {
+		this.movable(this.container.children('.' + this.opts.itemClass), true);
+		this.resizable(this.container.children('.' + this.opts.itemClass), true);
+		this.container.trigger('enable');
+	};
+
+	GridStack.prototype.locked = function(el, val) {
+		el = $(el);
+		el.each(function(index, el) {
+			el = $(el);
+			var node = el.data('_gridstack_node');
+			if (typeof node == 'undefined' || node === null) {
+				return;
+			}
+
+			node.locked = (val || false);
+			el.attr('data-gs-locked', node.locked ? 'yes' : null);
+		});
+		return this;
+	};
+
+	GridStack.prototype.minHeight = function(el, val) {
+		el = $(el);
+		el.each(function(index, el) {
+			el = $(el);
+			var node = el.data('_gridstack_node');
+			if (typeof node == 'undefined' || node === null) {
+				return;
+			}
+
+			if (!isNaN(val)) {
+				node.minHeight = (val || false);
 				el.attr('data-gs-min-height', val);
 			}
 		});
 		return this;
 	};
 
-	GridStack.prototype.min_width = function (el, val) {
+	GridStack.prototype.minWidth = function(el, val) {
 		el = $(el);
-		el.each(function (index, el) {
+		el.each(function(index, el) {
 			el = $(el);
 			var node = el.data('_gridstack_node');
-			if (typeof node == 'undefined' || node == null) {
+			if (typeof node == 'undefined' || node === null) {
 				return;
 			}
 
-			if(!isNaN(val)){
-				node.min_width = (val || false);
+			if (!isNaN(val)) {
+				node.minWidth = (val || false);
 				el.attr('data-gs-min-width', val);
 			}
 		});
 		return this;
 	};
 
-    GridStack.prototype._update_element = function(el, callback) {
-        el = $(el).first();
-        var node = el.data('_gridstack_node');
-        if (typeof node == 'undefined' || node == null) {
-            return;
-        }
+	GridStack.prototype._updateElement = function(el, callback) {
+		el = $(el).first();
+		var node = el.data('_gridstack_node');
+		if (typeof node == 'undefined' || node === null) {
+			return;
+		}
 
-        var self = this;
+		var self = this;
 
-        self.grid.clean_nodes();
-        self.grid.begin_update(node);
+		self.grid.cleanNodes();
+		self.grid.beginUpdate(node);
 
-        callback.call(this, el, node);
+		callback.call(this, el, node);
 
-        self._update_container_height();
-        self._trigger_change_event();
+		self._updateContainerHeight();
+		self._triggerChangeEvent();
 
-        self.grid.end_update();
-    };
+		self.grid.endUpdate();
+	};
 
-    GridStack.prototype.resize = function(el, width, height) {
-        this._update_element(el, function(el, node) {
-            width = (width != null && typeof width != 'undefined') ? width : node.width;
-            height = (height != null && typeof height != 'undefined') ? height : node.height;
+	GridStack.prototype.resize = function(el, width, height) {
+		this._updateElement(el, function(el, node) {
+			width = (width !== null && typeof width != 'undefined') ? width : node.width;
+			height = (height !== null && typeof height != 'undefined') ? height : node.height;
 
-            this.grid.move_node(node, node.x, node.y, width, height);
-        });
-    };
+			this.grid.moveNode(node, node.x, node.y, width, height);
+		});
+	};
 
-    GridStack.prototype.move = function(el, x, y) {
-        this._update_element(el, function(el, node) {
-            x = (x != null && typeof x != 'undefined') ? x : node.x;
-            y = (y != null && typeof y != 'undefined') ? y : node.y;
+	GridStack.prototype.move = function(el, x, y) {
+		this._updateElement(el, function(el, node) {
+			x = (x !== null && typeof x != 'undefined') ? x : node.x;
+			y = (y !== null && typeof y != 'undefined') ? y : node.y;
 
-            this.grid.move_node(node, x, y, node.width, node.height);
-        });
-    };
+			this.grid.moveNode(node, x, y, node.width, node.height);
+		});
+	};
 
-    GridStack.prototype.update = function(el, x, y, width, height) {
-        this._update_element(el, function(el, node) {
-            x = (x != null && typeof x != 'undefined') ? x : node.x;
-            y = (y != null && typeof y != 'undefined') ? y : node.y;
-            width = (width != null && typeof width != 'undefined') ? width : node.width;
-            height = (height != null && typeof height != 'undefined') ? height : node.height;
+	GridStack.prototype.update = function(el, x, y, width, height) {
+		this._updateElement(el, function(el, node) {
+			x = (x !== null && typeof x != 'undefined') ? x : node.x;
+			y = (y !== null && typeof y != 'undefined') ? y : node.y;
+			width = (width !== null && typeof width != 'undefined') ? width : node.width;
+			height = (height !== null && typeof height != 'undefined') ? height : node.height;
 
-            this.grid.move_node(node, x, y, width, height);
-        });
-    };
+			this.grid.moveNode(node, x, y, width, height);
+		});
+	};
 
-    GridStack.prototype.cell_height = function(val) {
-        if (typeof val == 'undefined') {
-            return this.opts.cell_height;
-        }
-        val = parseInt(val);
-        if (val == this.opts.cell_height)
-            return;
-        this.opts.cell_height = val || this.opts.cell_height;
-        this._update_styles();
-    };
+	GridStack.prototype.cellHeight = function(val) {
+		if (typeof val == 'undefined') {
+			return this.opts.cellHeight;
+		}
+		val = parseInt(val);
+		if (val == this.opts.cellHeight) {
+			return;
+		}
+		this.opts.cellHeight = val || this.opts.cellHeight;
+		this._updateStyles();
+	};
 
-    GridStack.prototype.cell_width = function() {
-        var o = this.container.children('.' + this.opts.item_class).first();
-        return Math.ceil(o.outerWidth() / o.attr('data-gs-width'));
-    };
+	GridStack.prototype.cellWidth = function() {
+		var o = this.container.children('.' + this.opts.itemClass).first();
+		return Math.ceil(o.outerWidth() / o.attr('data-gs-width'));
+	};
 
-    GridStack.prototype.get_cell_from_pixel = function(position) {
-        var containerPos = this.container.position();
-        var relativeLeft = position.left - containerPos.left;
-        var relativeTop = position.top - containerPos.top;
+	GridStack.prototype.getCellFromPixel = function(position) {
+		var containerPos = this.container.position();
+		var relativeLeft = position.left - containerPos.left;
+		var relativeTop = position.top - containerPos.top;
 
-        var column_width = Math.floor(this.container.width() / this.opts.width);
-        var row_height = this.opts.cell_height + this.opts.vertical_margin;
+		var columnWidth = Math.floor(this.container.width() / this.opts.width);
+		var rowHeight = this.opts.cellHeight + this.opts.verticalMargin;
 
-        return {x: Math.floor(relativeLeft / column_width), y: Math.floor(relativeTop / row_height)};
-    };
+		return {x: Math.floor(relativeLeft / columnWidth), y: Math.floor(relativeTop / rowHeight)};
+	};
 
-    GridStack.prototype.batch_update = function() {
-        this.grid.batch_update();
-    };
+	GridStack.prototype.batchUpdate = function() {
+		this.grid.batchUpdate();
+	};
 
-    GridStack.prototype.commit = function() {
-        this.grid.commit();
-        this._update_container_height();
-    };
+	GridStack.prototype.commit = function() {
+		this.grid.commit();
+		this._updateContainerHeight();
+	};
 
-    GridStack.prototype.is_area_empty = function(x, y, width, height) {
-        return this.grid.is_area_empty(x, y, width, height);
-    };
+	GridStack.prototype.isAreaEmpty = function(x, y, width, height) {
+		return this.grid.isAreaEmpty(x, y, width, height);
+	};
 
-    GridStack.prototype.set_static = function(static_value) {
-        this.opts.static_grid = (static_value === true);
-        this._set_static_class();
-    };
+	GridStack.prototype.setStatic = function(staticValue) {
+		this.opts.staticGrid = (staticValue === true);
+		this._setStaticClass();
+	};
 
-    GridStack.prototype._set_static_class = function() {
-        var static_class_name = 'grid-stack-static';
+	GridStack.prototype._setStaticClass = function() {
+		var staticClassName = 'grid-stack-static';
 
-        if (this.opts.static_grid === true) {
-            this.container.addClass(static_class_name);
-        } else {
-            this.container.removeClass(static_class_name);
-        }
-    };
+		if (this.opts.staticGrid === true) {
+			this.container.addClass(staticClassName);
+		} else {
+			this.container.removeClass(staticClassName);
+		}
+	};
 
-    scope.GridStackUI = GridStack;
+	// jscs:disable requireCamelCaseOrUpperCaseIdentifiers
+	GridStackEngine.prototype.batch_update = obsolete(GridStackEngine.prototype.batchUpdate);
+	GridStackEngine.prototype._fix_collisions = obsolete(GridStackEngine.prototype._fixCollisions,
+		'_fix_collisions', '_fixCollisions');
+	GridStackEngine.prototype.is_area_empty = obsolete(GridStackEngine.prototype.isAreaEmpty,
+		'is_area_empty', 'isAreaEmpty');
+	GridStackEngine.prototype._sort_nodes = obsolete(GridStackEngine.prototype._sortNodes,
+		'_sort_nodes', '_sortNodes');
+	GridStackEngine.prototype._pack_nodes = obsolete(GridStackEngine.prototype._packNodes,
+		'_pack_nodes', '_packNodes');
+	GridStackEngine.prototype._prepare_node = obsolete(GridStackEngine.prototype._prepareNode,
+		'_prepare_node', '_prepareNode');
+	GridStackEngine.prototype.clean_nodes = obsolete(GridStackEngine.prototype.cleanNodes,
+		'clean_nodes', 'cleanNodes');
+	GridStackEngine.prototype.get_dirty_nodes = obsolete(GridStackEngine.prototype.getDirtyNodes,
+		'get_dirty_nodes', 'getDirtyNodes');
+	GridStackEngine.prototype.add_node = obsolete(GridStackEngine.prototype.addNode,
+		'add_node', 'addNode, ');
+	GridStackEngine.prototype.remove_node = obsolete(GridStackEngine.prototype.removeNode,
+		'remove_node', 'removeNode');
+	GridStackEngine.prototype.can_move_node = obsolete(GridStackEngine.prototype.canMoveNode,
+		'can_move_node', 'canMoveNode');
+	GridStackEngine.prototype.move_node = obsolete(GridStackEngine.prototype.moveNode,
+		'move_node', 'moveNode');
+	GridStackEngine.prototype.get_grid_height = obsolete(GridStackEngine.prototype.getGridHeight,
+		'get_grid_height', 'getGridHeight');
+	GridStackEngine.prototype.begin_update = obsolete(GridStackEngine.prototype.beginUpdate,
+		'begin_update', 'beginUpdate');
+	GridStackEngine.prototype.end_update = obsolete(GridStackEngine.prototype.endUpdate,
+		'end_update', 'endUpdate');
+	GridStackEngine.prototype.can_be_placed_with_respect_to_height =
+		obsolete(GridStackEngine.prototype.canBePlacedWithRespectToHeight,
+		'can_be_placed_with_respect_to_height', 'canBePlacedWithRespectToHeight');
+	GridStack.prototype._trigger_change_event = obsolete(GridStack.prototype._triggerChangeEvent,
+		'_trigger_change_event', '_triggerChangeEvent');
+	GridStack.prototype._init_styles = obsolete(GridStack.prototype._initStyles,
+		'_init_styles', '_initStyles');
+	GridStack.prototype._update_styles = obsolete(GridStack.prototype._updateStyles,
+		'_update_styles', '_updateStyles');
+	GridStack.prototype._update_container_height = obsolete(GridStack.prototype._updateContainerHeight,
+		'_update_container_height', '_updateContainerHeight');
+	GridStack.prototype._is_one_column_mode = obsolete(GridStack.prototype._isOneColumnMode,
+		'_is_one_column_mode',' _isOneColumnMode');
+	GridStack.prototype._prepare_element = obsolete(GridStack.prototype._prepareElement,
+		'_prepare_element', '_prepareElement');
+	GridStack.prototype.set_animation = obsolete(GridStack.prototype.setAnimation,
+		'set_animation', 'setAnimation');
+	GridStack.prototype.add_widget = obsolete(GridStack.prototype.addWidget,
+		'add_widget', 'addWidget');
+	GridStack.prototype.make_widget = obsolete(GridStack.prototype.makeWidget,
+		'make_widget', 'makeWidget');
+	GridStack.prototype.will_it_fit = obsolete(GridStack.prototype.willItFit,
+		'will_it_fit', 'willItFit');
+	GridStack.prototype.remove_widget = obsolete(GridStack.prototype.removeWidget,
+		'remove_widget', 'removeWidget');
+	GridStack.prototype.remove_all = obsolete(GridStack.prototype.removeAll,
+		'remove_all', 'removeAll');
+	GridStack.prototype.min_height = obsolete(GridStack.prototype.minHeight,
+		'min_height', 'minHeight');
+	GridStack.prototype.min_width = obsolete(GridStack.prototype.minWidth,
+		'min_width', 'minWidth');
+	GridStack.prototype._update_element = obsolete(GridStack.prototype._updateElement,
+		'_update_element', '_updateElement');
+	GridStack.prototype.cell_height = obsolete(GridStack.prototype.cellHeight,
+		'cell_height', 'cellHeight');
+	GridStack.prototype.cell_width = obsolete(GridStack.prototype.cellWidth,
+		'cell_width', 'cellWidth');
+	GridStack.prototype.get_cell_from_pixel = obsolete(GridStack.prototype.getCellFromPixel,
+		'get_cell_from_pixel', 'getCellFromPixel');
+	GridStack.prototype.batch_update = obsolete(GridStack.prototype.batchUpdate,
+		'batch_update', 'batchUpdate');
+	GridStack.prototype.is_area_empty = obsolete(GridStack.prototype.isAreaEmpty,
+		'is_area_empty', 'isAreaEmpty');
+	GridStack.prototype.set_static = obsolete(GridStack.prototype.setStatic,
+		'set_static', 'setStatic');
+	GridStack.prototype._set_static_class = obsolete(GridStack.prototype._setStaticClass,
+		'_set_static_class', '_setStaticClass');
+	// jscs:enable requireCamelCaseOrUpperCaseIdentifiers
 
-    scope.GridStackUI.Utils = Utils;
+	scope.GridStackUI = GridStack;
 
-    $.fn.gridstack = function(opts) {
-        return this.each(function() {
-            var o = $(this);
-            if (!o.data('gridstack')) {
-                o
-                    .data('gridstack', new GridStack(this, opts));
-            }
-        });
-    };
+	scope.GridStackUI.Utils = Utils;
 
-    return scope.GridStackUI;
+	$.fn.gridstack = function(opts) {
+		return this.each(function() {
+			var o = $(this);
+			if (!o.data('gridstack')) {
+				o
+					.data('gridstack', new GridStack(this, opts));
+			}
+		});
+	};
+
+	return scope.GridStackUI;
 });