index.htm =====>
<script language="Javascript">
<!--
function openURL(source){
document.getElementById("ye").src=source;
}
//-->
</script>
<div style="float:left" id="yexj00">
<a href="#" onclick="openURL('a.htm')">地址一</a><br />
<a href="#" onclick="openURL('b.htm')">地址二</a><br />
<a href="#" onclick="openURL('c.htm')">地址三</a>
</div>
<div style="float:left;padding-left:20px">
<iframe src="about:blank" style="width:300px;height:200px" id="ye" name="ye"></iframe>
</div>
---------------------------------------------
a.htm =====>
<meta http-equiv="refresh" content="3;url='
http://www.baidu.com'">
这里是a.htm页面的内容
--------------------------------------------
b.htm =====>
<meta http-equiv="refresh" content="3;url='
http://www.baidu.com'">
这里是b.htm页面的内容
---------------------------------------------
c.htm =====>
<meta http-equiv="refresh" content="3;url='
http://www.baidu.com'">
这里是c.htm页面的内容本回答被提问者采纳