<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>
<!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>
<title>无标题页</title>
<script>
window.onload =function(){
alert(document.getElementById('<%=Label3.ClientID %>').innerHTML);
}
</script>
</head>
<body>
<form runat="server" >
<asp:Label ID="Label3" runat="server">test</asp:Label>
</form>
</body>
</html>
