var img_width = "468";
var img_height = "60";
var img_title = "click here";


var ad=new Array()
//insert here your images src
ad[0]='http://www.surefish.co.uk/ads/aqua/netsnow2011.gif';
ad[1]='http://www.surefish.co.uk/ads/aqua/nigel.gif';

var links=new Array()
//insert here your links
links[0]=' http://www.netsnow.org?utm_source=display&utm_medium=leaderboard&utm_content=boy&utm_campaign=surefish';
links[1]=' http://www.nigelsecostore.com/cgi-bin/affiliate/clickme.cgi?exec=surefish&site=site1';

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