var banners = new Array(); 
banners[0] = '<iframe allowtransparency="true" src="http://www.betway.com/at?action=asset_req&track=C9CA442765657FC90E9E779C34D0D2259D2C3C5B&asset_id=112" width="728" height="90" marginwidth="0" marginheight="0" scrolling="no" frameborder="0" style="border-width:0"></iframe>';
banners[1] = '<iframe allowtransparency="true" src="http://www.betway.com/at?action=asset_req&track=C9CA442765657FC90E9E779C34D0D2259D2C3C5B&asset_id=112" width="728" height="90" marginwidth="0" marginheight="0" scrolling="no" frameborder="0" style="border-width:0"></iframe>';
index = Math.floor(Math.random() * banners.length);
if (typeof banners[index] == 'object') document.write(banners[index][0] + '<span class="text">' + banners[index][1] + '</span>');
else document.write(banners[index]);