var ord = parseInt(Math.random()*10000);
var ordstr = '<a href="http://ad.doubleclick.net/jump/fw.ghostriderskintemp/;sz=1x1;ord='+ord+'?" target="_blank">'
             + '<img src="http://ad.doubleclick.net/ad/fw.ghostriderskintemp/;sz=1x1;ord='+ord+'?" width="1" height="1" border="0" alt=""></a>';
document.write(ordstr);