1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:

<script LANGUAGE="JavaScript">
<!--
var z= 2;
Banner = new Array(z);
Banner[0] ='Banner1';
Banner[1] ='Banner2';
var jetzt=new Date();
var z=(jetzt.getSeconds())%2;
document.write(Banner[z]);
//-->
</script>

1:

Banner[0]='<a href="http://your-wbb.de><img src="http://your-wbb.de/images1.gif></a>'