diff --git a/app/assets/javascripts/application.js.erb b/app/assets/javascripts/application.js.erb
index 260d3ae..14a4851 100644
--- a/app/assets/javascripts/application.js.erb
+++ b/app/assets/javascripts/application.js.erb
@@ -293,10 +293,14 @@ $(document).ready(function() {
     }
 
     var comment = $(this).closest(".comment");
+    if ($("#reply_form_" + comment.attr("id")).length > 0)
+      return false;
+
     var replies = comment.nextAll(".comments").first();
     $.get("/comments/" + comment.attr("data-shortid") + "/reply",
     function(data) {
       var reply = $($.parseHTML(data));
+      reply.attr("id", "reply_form_" + comment.attr("id"));
       replies.prepend(reply);
       reply.find("textarea").focus();
     });