// Use as many listings as you want.
var mess = new Array(
'<a href="ads/000052/"><img src="ads/000052/thumb1.jpg" border="0"></a>',
'<a href="ads/000003/"><img src="ads/000003/thumb1.jpg" border="0"></a>',
'<a href="ads/000004/"><img src="ads/000004/thumb1.jpg" border="0"></a>',
'<a href="ads/000010/"><img src="ads/000010/thumb1.jpg" border="0"></a>',
'<a href="ads/000011/"><img src="ads/000011/thumb1.jpg" border="0"></a>',
'<a href="ads/000012/"><img src="ads/000012/thumb1.jpg" border="0"></a>');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);