iframe multi-link

<a href="javascript:jumpto('http://www.cnn.com')">CNN.com</a> | 
<a href="javascript:jumpto('http://www.msnbc.com')">MSNBC</a> | 
<a href="javascript:jumpto('http://www.abcnews.com')">ABC News</a> | 
<a href="javascript:jumpto('http://news.bbc.co.uk')">BBC UK News</a>

<script language="javascript">
<!--
var displaymode=0
var iframecode='<iframe id="external" style="width:95%;height:400px" src="http://www.yahoo.com"></iframe>'

if (displaymode==0)
document.write(iframecode)

function jumpto(inputurl){
if (document.getElementById&&displaymode==0)
document.getElementById("external").src=inputurl
else if (document.all&&displaymode==0)
document.all.external.src=inputurl
else{
if (!window.win2||win2.closed)
win2=window.open(inputurl)
else{
win2.location=inputurl
win2.focus()
}
}
}
-->
</script>