<script type="text/javascript">
var urls=new Array();
urls[0] = 'http://www.google.de';
urls[1] = 'http://www.pcgameshardware.de';
</script>
<iframe src="" id="framy"></iframe>
<script type="text/javascript">
var urlaktuell = 0;
setTimeout("url()", 1000);
function url()
{
document.getElementById('framy').src = urls[urlaktuell];
urlaktuell++;
if(urlaktuell == urls.length)
{
urlaktuell = 0;
}
setTimeout("url()", 3000);
}
</script>