diff --git a/admin/editor-js.php b/admin/editor-js.php
index bafe6e4a..eb4621e6 100644
--- a/admin/editor-js.php
+++ b/admin/editor-js.php
@@ -166,6 +166,8 @@ $(document).ready(function () {
         }
     });
 
+    <?php Typecho_Plugin::factory('admin/editor-js.php')->markdownEditor($content); ?>
+
     var input = $('#text'), th = textarea.height(), ph = preview.height();
 
     editor.hooks.chain('enterFakeFullScreen', function () {
diff --git a/admin/js/pagedown.js b/admin/js/pagedown.js
index fbb9a5b2..89e34679 100644
--- a/admin/js/pagedown.js
+++ b/admin/js/pagedown.js
@@ -1666,6 +1666,9 @@ else
                                                   * its own image insertion dialog, this hook should return true, and the callback should be called with the chosen
                                                   * image url (or null if the user cancelled). If this hook returns false, the default dialog will be used.
                                                   */
+
+        hooks.addNoop("makeButton");
+
         hooks.addNoop("enterFullScreen");
         hooks.addNoop("enterFakeFullScreen");
         hooks.addNoop("exitFullScreen");
@@ -1699,7 +1702,7 @@ else
             }
             
             fullScreenManager = new FullScreenManager(hooks, getString);
-            uiManager = new UIManager(idPostfix, panels, undoManager, previewManager, commandManager, fullScreenManager, options.helpButton, getString);
+            uiManager = new UIManager(idPostfix, panels, hooks, undoManager, previewManager, commandManager, fullScreenManager, options.helpButton, getString);
             uiManager.setUndoRedoButtonStates();
 
             var forceRefresh = that.refreshPreview = function () { previewManager.refresh(true); };
@@ -2614,6 +2617,132 @@ else
         return background;
     };
 
+    // 扩展了原来ui的功能
+    // 允许创建一个自定义html的对话框
+    ui.dialog = function (html, callback, ok, cancel) {
+
+        // These variables need to be declared at this level since they are used
+        // in multiple functions.
+        var dialog;         // The dialog box.
+
+        // Used as a keydown event handler. Esc dismisses the prompt.
+        // Key code 27 is ESC.
+        var checkEscape = function (key) {
+            var code = (key.charCode || key.keyCode);
+            if (code === 27) {
+                close(true);
+            }
+        };
+
+        // Dismisses the hyperlink input box.
+        // isCancel is true if we don't care about the input text.
+        // isCancel is false if we are going to keep the text.
+        var close = function (isCancel) {
+            util.removeEvent(doc.body, "keydown", checkEscape);
+            dialog.parentNode.removeChild(dialog);
+
+            callback(isCancel);
+            return false;
+        };
+
+
+
+        // Create the text input box form/window.
+        var createDialog = function () {
+
+            // The main dialog box.
+            dialog = doc.createElement("div");
+            dialog.className = "wmd-prompt-dialog";
+            dialog.setAttribute("role", "dialog");
+            /*
+            dialog.style.padding = "10px;";
+            dialog.style.position = "fixed";
+            dialog.style.width = "400px";
+            dialog.style.zIndex = "1001";
+            */
+
+            // The dialog text.
+            var question = doc.createElement("div");
+
+            // The web form container for the text box and buttons.
+            var form = doc.createElement("form"),
+                style = form.style;
+            form.onsubmit = function () { return close(false); };
+            /*
+            style.padding = "0";
+            style.margin = "0";
+            style.cssFloat = "left";
+            style.width = "100%";
+            style.textAlign = "center";
+            style.position = "relative";
+            */
+            dialog.appendChild(form);
+            form.appendChild(question);
+
+            if ('function' == typeof(html)) {
+                html.call(this, question);
+            } else {
+                question.innerHTML = html;
+            }
+
+            // The ok button
+            var okButton = doc.createElement("button");
+            okButton.type = "button";
+            okButton.className = "btn-s primary";
+            okButton.onclick = function () { return close(false); };
+            okButton.innerHTML = ok;
+            /*
+            style = okButton.style;
+            style.margin = "10px";
+            style.display = "inline";
+            style.width = "7em";
+            */
+
+            // The cancel button
+            var cancelButton = doc.createElement("button");
+            cancelButton.type = "button";
+            cancelButton.className = "btn-s";
+            cancelButton.onclick = function () { return close(true); };
+            cancelButton.innerHTML = cancel;
+            /*
+            style = cancelButton.style;
+            style.margin = "10px";
+            style.display = "inline";
+            style.width = "7em";
+            */
+
+            form.appendChild(okButton);
+            form.appendChild(cancelButton);
+
+            util.addEvent(doc.body, "keydown", checkEscape);
+            /*
+            dialog.style.top = "50%";
+            dialog.style.left = "50%";
+            dialog.style.display = "block";
+            if (uaSniffed.isIE_5or6) {
+                dialog.style.position = "absolute";
+                dialog.style.top = doc.documentElement.scrollTop + 200 + "px";
+                dialog.style.left = "50%";
+            }
+            */
+            doc.body.appendChild(dialog);
+
+            // This has to be done AFTER adding the dialog to the form if you
+            // want it to be centered.
+            /*
+            dialog.style.marginTop = -(position.getHeight(dialog) / 2) + "px";
+            dialog.style.marginLeft = -(position.getWidth(dialog) / 2) + "px";
+            */
+
+        };
+
+        // Why is this in a zero-length timeout?
+        // Is it working around a browser bug?
+        setTimeout(function () {
+            createDialog();
+        }, 0);
+    }
+
     // This simulates a modal dialog box and asks for the URL when you
     // click the hyperlink or image buttons.
     //
@@ -2788,7 +2917,7 @@ else
         }, 0);
     };
 
-    function UIManager(postfix, panels, undoManager, previewManager, commandManager, fullScreenManager, helpOptions, getString) {
+    function UIManager(postfix, panels, hooks, undoManager, previewManager, commandManager, fullScreenManager, helpOptions, getString) {
 
         var inputBox = panels.input,
             buttons = {}; // buttons.undo, buttons.link, etc. The actual DOM elements.
@@ -3094,6 +3223,9 @@ else
             buttons.exitFullscreen.style.display = 'none';
             buttons.exitFullscreen.execute = function () { fullScreenManager.doFullScreen(buttons, false); };
 
+            // button hooks
+            hooks.makeButton(buttons, makeButton, bindCommand, ui);
+
             if (helpOptions) {
                 var helpButton = document.createElement("li");
                 var helpButtonImage = document.createElement("span");
diff --git a/var/Typecho/Validate.php b/var/Typecho/Validate.php
index f186c0d9..f5e8fab0 100644
--- a/var/Typecho/Validate.php
+++ b/var/Typecho/Validate.php
@@ -110,7 +110,8 @@ class Typecho_Validate
         // Cycle through the rules and test for errors
         foreach ($rules as $key => $rules) {
             $this->_key = $key;
-            $data[$key] = (0 == strlen($data[$key])) ? NULL : $data[$key];
+            $data[$key] = (is_array($data[$key]) ? 0 == count($data[$key])
+                : 0 == strlen($data[$key])) ? NULL : $data[$key];
 
             foreach ($rules as $params) {
                 $method = $params[0];
diff --git a/var/Widget/Options/General.php b/var/Widget/Options/General.php
index 59de4a55..5d0bced3 100644
--- a/var/Widget/Options/General.php
+++ b/var/Widget/Options/General.php
@@ -148,7 +148,7 @@ class Widget_Options_General extends Widget_Abstract_Options implements Widget_I
         }
 
         $settings = $this->request->from('title', 'siteUrl', 'description', 'keywords', 'allowRegister', 'timezone', 'attachmentTypes');
-        $settings['siteUrl'] = rtrim('/', $settings['url']);
+        $settings['siteUrl'] = rtrim($settings['siteUrl'], '/');
 
         $attachmentTypes = array();
         if ($this->isEnableByCheckbox($settings['attachmentTypes'], '@image@')) {