work on comments

public/javascripts/src/app/comments.js

@@ -0,0 +1,42 @@
+(function() {
+  Danbooru.Comment = {};
+  
+  Danbooru.Comment.initialize_all = function() {
+    this.initialize_response_link();
+    this.initialize_preview_button();
+  }
+  
+  Danbooru.Comment.initialize_response_link = function() {
+    $("a.expand-comment-response").click(function(e) {
+      e.stopPropagation();
+      $(e.target).closest("div.new-comment").find("form").show();
+      $(e.target).hide();
+      return false;
+    });
+    
+    $("div.new-comment form").hide();
+  }
+  
+  Danbooru.Comment.initialize_preview_button = function() {
+    $("div.new-comment input[type=submit][value=Preview]").click(function(e) {
+      e.stopPropagation();
+      $.ajax({
+        context: e.target,
+        url: "/dtext/preview",
+        data: {
+          body: $(e.target).closest("form").find("textarea").val()
+        },
+        success: function(data, text_status, xhr) {
+          console.log($(this).closest("div.new-comment").find("div.comment-preview"));
+          $(this).closest("div.new-comment").find("div.comment-preview").show().html(data);
+        },
+        type: "post"
+      });
+      return false;
+    });
+  }
+})();
+
+$(document).ready(function() {
+  Danbooru.Comment.initialize_all();
+});