Exj js MessageBox.alert()报错

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Ext.MessageBox</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <link rel="stylesheet" type="text/css" href="../extjs/ext-3.2.0/resources/css/ext-all.css"/>  
 <script type="text/javascript" src="../extjs/ext-3.2.0/ext-all.js" ></script>  
<script type="text/javascript" src="../extjs/ext-3.2.0/adapter/ext/ext-base.js" ></script> 
   <script type="text/javascript">
    Ext.onReady(function() 
               {
                  Ext.MessageBox.alert{"hello","ws_hgo");
               });
</script> 
</head>
<body></body>
</html>上面的代码哪里错啦错误提示是:'Ext未定义'

解决方案 »

  1.   

    ext 引入不成功，可能是路径错误
      

  2.   

    换一下顺序
    <script type="text/javascript" src="../extjs/ext-3.2.0/adapter/ext/ext-base.js" ></script>
     <script type="text/javascript" src="../extjs/ext-3.2.0/ext-all.js" ></script>  
      

  3.   

        Ext.MessageBox.alert{"hello","ws_hgo");
    改成    Ext.MessageBox.alert("hello","ws_hgo");   太粗心了吧