diff --git a/GoogleAnalytics/Plugin.php b/GoogleAnalytics/Plugin.php
new file mode 100644
index 0000000..e52556f
--- /dev/null
+++ b/GoogleAnalytics/Plugin.php
@@ -0,0 +1,68 @@
+<?php
+/**
+ * Google Analytics
+ * 
+ * @package GoogleAnalytics
+ * @author mutoo
+ * @version 1.0.0
+ * @link http://typecho.org
+ */
+class GoogleAnalytics_Plugin implements Typecho_Plugin_Interface
+{
+    /**
+     * 激活插件方法,如果激活失败,直接抛出异常
+     * 
+     * @access public
+     * @return void
+     * @throws Typecho_Plugin_Exception
+     */
+    public static function activate()
+    {
+        Typecho_Plugin::factory('Widget_Archive')->footer = array('GoogleAnalytics_Plugin', 'render');
+    }
+    
+    /**
+     * 禁用插件方法,如果禁用失败,直接抛出异常
+     * 
+     * @static
+     * @access public
+     * @return void
+     * @throws Typecho_Plugin_Exception
+     */
+    public static function deactivate(){}
+    
+    /**
+     * 获取插件配置面板
+     * 
+     * @access public
+     * @param Typecho_Widget_Helper_Form $form 配置面板
+     * @return void
+     */
+    public static function config(Typecho_Widget_Helper_Form $form)
+    {
+        /** 分类名称 */
+        $account = new Typecho_Widget_Helper_Form_Element_Text('account', NULL, 'UA-XXXXXXX-X', _t('Google Analytics 帐号'));
+        $form->addInput($account);
+    }
+    
+    /**
+     * 个人用户的配置面板
+     * 
+     * @access public
+     * @param Typecho_Widget_Helper_Form $form
+     * @return void
+     */
+    public static function personalConfig(Typecho_Widget_Helper_Form $form){}
+    
+    /**
+     * 插件实现方法
+     * 
+     * @access public
+     * @return void
+     */
+    public static function render()
+    {
+        $account = Typecho_Widget::widget('Widget_Options')->plugin('GoogleAnalytics')->account;
+        echo "<script type=\"text/javascript\">var _gaq = _gaq || [];_gaq.push(['_setAccount', '{$account}}']);_gaq.push(['_trackPageview']);(function() {var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);})();</script>";
+    }
+}
\ No newline at end of file
diff --git a/LaTex/latex.js b/LaTex/latex.js
index bafc138..a9ecf44 100644
--- a/LaTex/latex.js
+++ b/LaTex/latex.js
@@ -5,7 +5,7 @@
 		var node = latex[i];
 		var latex_image = document.createElement("img");
 		latex_image.src = "http://latex.codecogs.com/png.latex?"+ node.innerHTML;
-
+		// replace with image
 		var parent = node.parentNode;
 		parent.insertBefore(latex_image, node);
 		parent.removeChild(node);