diff --git a/static/css/base.css b/static/css/base.css
index b4ddc0f..baab675 100644
--- a/static/css/base.css
+++ b/static/css/base.css
@@ -4,6 +4,7 @@ body {
     margin: 0;
     color: #000;
     overflow: hidden;
+    background-color: #F0F0F0;
 }
 
 ul {
diff --git a/static/js/tree.js b/static/js/tree.js
index f9b4618..fe56f28 100644
--- a/static/js/tree.js
+++ b/static/js/tree.js
@@ -105,7 +105,7 @@ var tree = {
                         callback: {
                             onDblClick: function (event, treeId, treeNode) {
                                 if (treeNode) {
-                                    tree._openFile(treeNode);
+                                    tree.openFile(treeNode);
                                 }
                             },
                             onRightClick: function (event, treeId, treeNode) {
diff --git a/view/index.html b/view/index.html
index c5d9699..e569034 100644
--- a/view/index.html
+++ b/view/index.html
@@ -172,17 +172,17 @@
             </div>
         </div>
 
-        <div id="dialogRemoveConfirm">
+        <div id="dialogRemoveConfirm" class="fn-none">
             {{.i18n.isDelete}} <b></b>?
         </div>
-        <div id="dialogAlert" class="none"></div>
-        <div id="dialogNewFilePrompt" class="dialog-prompt none">
+        <div id="dialogAlert" class="fn-none"></div>
+        <div id="dialogNewFilePrompt" class="dialog-prompt fn-none">
             <input/><span class="tip"></span>
         </div>
-        <div id="dialogNewDirPrompt" class="dialog-prompt none">
+        <div id="dialogNewDirPrompt" class="dialog-prompt fn-none">
             <input/><span class="tip"></span>
         </div>
-        <div id="dialogGoLinePrompt" class="dialog-prompt none">
+        <div id="dialogGoLinePrompt" class="dialog-prompt fn-none">
             <input/><span class="tip"></span>
         </div>
         <script>