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ext页面问题

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
  <link rel="stylesheet" type="text/css" href="CSS/ext-all.css" />
    <script src="JavaScript/initPublic.js" type="text/javascript"></script>
    <script src="JavaScript/ext-base.js" type="text/javascript"></script>

    <script type="text/javascript" src="JavaScript/ext-all.js"></script>

</head>
<body>
    <form id="form1" runat="server">
        <ext:PageManager ID="PageManager1" AutoSizePanelID="Panel8" runat="server" HideScrollbar="true" />
       <ext:Panel   ID="Panel8" ShowBorder="True" ShowHeader="false" AnchorValue="50%" Layout="Fit"
            runat="server">
            <Items>
                <ext:SimpleForm ID="详细信息" runat="server">
                <Items >
                    <ext:ContentPanel ShowBorder="false" ShowHeader="false" EnableBackgroundColor="true"
                        ID="ContentPanel2" runat="server">
                        <table cellpadding="0" cellspacing="0" width="100%">
                            <tr>
                                <td width="50%">
                                    档案号:<asp:Label ID="lblCODE" runat="server">
                                    </asp:Label>
                                </td>
                                <td>
                                    名称:
                                    <asp:Label ID="lblName" runat="server">
                                    </asp:Label>
                                </td>
                            </tr>
                                   </table>
                    </ext:ContentPanel>
                    </Items>
                </ext:SimpleForm>
          </Items>
        </ext:Panel>
        
  </form> 
</body>
</html>


上面是我写的前台代码 可运行起来在IE里显示等都正常 就是不管点击到该控件哪里都会报“对象不支持该属性或方法” 调试也不能调试。请问这是怎么回事呀? 哪里出错了。?我把<asp:Label ID="lblName" runat="server">
改成<ext:Label.....也都一样会报错。 --------------------编程问答-------------------- --------------------编程问答--------------------     <ext:ScriptManager runat="server" AjaxMethodNamespace="Ajax_ShowUser">
    </ext:ScriptManager>
没这个! --------------------编程问答-------------------- ext是什么!~。 --------------------编程问答-------------------- 查看相关EXT的API 
是否少JS引用等。 --------------------编程问答-------------------- 引用的都对呀!! --------------------编程问答-------------------- <script src="JavaScript/ext-base.js" type="text/javascript"></script>
  <script type="text/javascript" src="JavaScript/ext-all.js"></script>

放在

<script src="JavaScript/initPublic.js" type="text/javascript"></script>

上面。
--------------------编程问答-------------------- coolite现在叫:ext.net是将EXTJS类库写成了服务器控件库,对于喜欢用服务器控件的人提供方便,不过那个东西是收费的好象. --------------------编程问答--------------------
引用 6 楼 gongsun 的回复:
<script src="JavaScript/ext-base.js" type="text/javascript"></script>
  <script type="text/javascript" src="JavaScript/ext-all.js"></script>

放在

<script src="JavaScript/initPublic.js" type="text……


试了 还是不行呀!!
补充:.NET技术 ,  ASP.NET
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