iframe 嵌套页面
In top page:
<script type="text/javascript" language="javascript">
function changedSouce()
{
var left=window.parent.window.document.getElementById("two");
left.src = "right.aspx";
var content=window.parent.window.document.getElementById("three");
content.src = "left.aspx";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>无标题页</title>
</head>
<frameset rows="10%,90%">
<frame id = "one" src="top.aspx">
<frameset cols="25%,75%">
<frame id = "two" src="left.aspx">
<frame id = "three" src="right.aspx">
</frameset>
</frameset>
</html>