[Thug]

hi i have some adsense ads i want to put up
how do i get the banners to rotate from 1 to another?
heres the codes

<script language="javascript">
var uri = 'http://impgb.tradedoubler.com/imp/img/861694/1065963?' + new String (Math.random()).substring (2, 11);
document.write('<a href="http://clkuk.tradedoubler.com/click?p=7688&a=1065963&g=861694" target="_blank"><img src="'+uri+'" border=0></a>');
</script>

<script language="javascript">
var uri = 'http://impgb.tradedoubler.com/imp/img/96957/1065963?' + new String (Math.random()).substring (2, 11);
document.write('<a href="http://clkuk.tradedoubler.com/click?p=8226&a=1065963&g=96957" target="_blank"><img src="'+uri+'" border=0></a>');
</script>

<script language="javascript">
var uri = 'http://impgb.tradedoubler.com/imp/img/995292/1065963?' + new String (Math.random()).substring (2, 11);
document.write('<a href="http://clkuk.tradedoubler.com/click?p=17964&a=1065963&g=995292" target="_blank"><img src="'+uri+'" border=0></a>');
</script>