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PopupControlExtender:ÊÇÒ»¸ö¿ÉÒÔ¿ØÖÆPopupÔØÌåµÄ×é¼þ£¬Ëü±¾Éí ²¢²»»á²úÉúPopup¿Ø¼þ£¬ËüµÄ×÷ÓÃÊÇ¿ØÖÆPopupÔØÌ壬ÀýÈçpanel£¬divµÈµÄÏÔʾ.
DynamicPopulateExtender:ÊÇÒ»¸ö¿ÉÒÔʵÏÖ¶¯Ì¬Ð§¹ûµÄ×é¼þ.
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  <asp:Panel ID="pnlPopup" runat="server" CssClass="frame" Style="display: none" mce_Style="display: none">
<div class="overlay">
<asp:Panel ID="pnlHeader" runat="server" CssClass="header">
<asp:Label ID="Label1" runat="server" CssClass="msg" Text="Tip of the Day" />
<asp:LinkButton ID="LinkButton1" runat="server" CssClass="close" OnClientClick="$find('popup').hidePopup(); return false;" />
</asp:Panel>
<asp:Panel ID="pnlBody" runat="server" CssClass="body">
<%= NextTip() %>
</asp:Panel>
<div class="footer">
<asp:Button ID="btnNextTip" runat="server" Text="Next Tip" OnClientClick="return false;" />
<asp:Button ID="Button1" runat="server" Text="Close" OnClientClick="$find('popup').hidePopup(); return false;" />
</div>
</div>
<div class="underlay">
</div>
</asp:Panel>
<asp:Button ID="btnPopup" runat="server" Text="Show Tip of the Day" OnClientClick="return false;" />
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//Õâ¸ö·½·¨½«Ê¹ÓÃXMLHTTPRequest¶ÔÏóÀ´½øÐÐAJAXµÄÒì²½Êý¾Ý½»»¥
var xmlhttp;
function verify() {
    //0¡£Ê¹ÓÃdomµÄ·½Ê½»ñÈ¡Îı¾¿òÖеÄÖµ
    //document.getElementById("userName")ÊÇdomÖлñÈ¡ÔªËØ½ÚµãµÄÒ»ÖÖ·½·¨£¬Ò»¸öÔªËØ½Úµã¶ÔÓ¦HTMLÒ³ÃæÖеÄÒ»¸ö± ......

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jsonÖÐÎĹٷ½£ºhttp://www.json.org/json-zh.html
н¨ÏîÄ¿webs£¬ÔÚWebRootÏÂн¨Ä¿Â¼json
xmlµÄ½âÎö·½Ê½:
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<scrīpt Language="Javascrīpt">
<!--
// author:±¼ÌÚµÄÐÄ
//     qq:7180001
function Ajax(OnError,OnState,OnDownloadEnd)
{
        this.ErrorStr                 = null;
        ......

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2./*****struts.xml**************************************************************/
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