var img_width = "320";
var img_height = "503";



var ad=new Array()
//insert here your images src
ad[0]='topbanner1.jpg';
ad[1]='topbanner2.jpg';
ad[2]='topbanner3.jpg';
ad[3]='topbanner4.jpg';


var links=new Array()
//insert here your links
links[0]='http://www.sasamedia.com';
links[1]='http://www.sasamedia.com';
links[2]='http://www.sasamedia.com';
links[3]='http://www.sasamedia.com';



var xy=Math.floor(Math.random()*ad.length);
document.write('<a href="'+links[xy]+'" target="_top"><img src="'+ad[xy]+'" width="'+img_width+'" border="0" height="'+img_height+'"></a>');