var rnd = Math.random();

function LoadAd(CGru) {
document.write ('<A HREF="http://www.bolivia.com/scripts/linkserver.asp?CGru=' + CGru + '&Rnd=' +  rnd + '" target="new"><BR>');
document.write ('<IMG SRC="http://www.bolivia.com/scripts/adserver.asp?CGru=' + CGru + '&Rnd=' +  rnd + '" WIDTH=468 HEIGHT=60 BORDER=0></A>');
}