diff --git a/lib/client/edit.js b/lib/client/edit.js
index a9624d3d..7f611505 100644
--- a/lib/client/edit.js
+++ b/lib/client/edit.js
@@ -89,7 +89,9 @@ var CloudCmd, Util, DOM, CloudFunc, ace, DiffProto, diff_match_patch, Zip;
                     var UndoManager = ace.require('ace/undomanager').UndoManager;
                     
                     Ace.setValue(Value);
-                    CloudCmd.View.show(Element, focus);
+                    CloudCmd.View.show(Element, focus, {
+                        beforeClose: isChanged
+                    });
                     
                     Session.setUndoManager(new UndoManager());
                 }, function(callback) {
@@ -121,6 +123,20 @@ var CloudCmd, Util, DOM, CloudFunc, ace, DiffProto, diff_match_patch, Zip;
                 Ace.gotoLine(number);
         };
         
+        function isChanged() {
+            var is,
+                value   = Ace.getValue(),
+                isEqual = value === Value,
+                msg     = 'Do you want to save changes to ' + name + '?';
+            
+            if (!isEqual) {
+                is = Dialog.confirm(msg);
+                
+                if (is)
+                    save();
+            }
+        }
+        
         function setEmmet(isHTML) {
             getEditConfig(function(config) {
                 var extensions  = config.extensions,
diff --git a/lib/client/view.js b/lib/client/view.js
index afe7d207..0a2e3130 100644
--- a/lib/client/view.js
+++ b/lib/client/view.js
@@ -72,7 +72,7 @@ var CloudCmd, Util, DOM, CloudFunc, $;
          * function shows FancyBox
          */
         function show(data, callback, newConfig) {
-            var path, element, func, name,
+            var path, element, func,
                 config = {};
             
             if (!Loading) {
@@ -86,8 +86,20 @@ var CloudCmd, Util, DOM, CloudFunc, $;
                     
                     Util.copyObj(config, Config);
                     
-                    for (name in newConfig)
-                        config[name] = newConfig[name];
+                    if (newConfig)
+                        Object.keys(newConfig).forEach(function(name) {
+                            var func,
+                                asyncCall       = Util.asyncCall,
+                                item            = newConfig[name],
+                                isFunc          = Util.isFunction(item);
+                            
+                            if (isFunc) {
+                                func            = config[name];
+                                config[name]    = Util.bind(asyncCall, [item, func]);
+                            } else {
+                                config[name]    = newConfig[name];
+                            }
+                        });
                     
                     $.fancybox(element, config);