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<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>主页面</title>
<script type ="text/javascript" language ="javascript" >
function callfun()
{
//调用子窗口函数showmsg();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input id="Button1" type="button" value="call subfrm" onclick ="callfun()" />
<iframe id="subfrm" src="b.aspx"></iframe>
</div>
</form>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>子页面</title>
<script type ="text/javascript" language ="javascript" >
function showmsg()
{
alert("call by mainfrm!");
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>