function dq(s) { return (s != null) ? '"' + s + '"' : '""'; }
function ch_vbu(){
	var chId = (ch_id==null) ? 1 :ch_id;
	var ch_ad_url = 'http://chitika.com/vbu/test.php?id='+chId;
	var r = Math.round(Math.random() * 1000); 
	document.write('<ifr' + 'ame' + ' width="350" height="250" name="ch_ad'+r+'"' + ' frameborder="0"' + ' src=' + dq(ch_ad_url) + ' marginwidth="0"' + ' marginheight="0"' + ' vspace="0"' + ' hspace="0"' + ' allowtransparency="true"' + ' scrolling="no">' + '</ifr' + 'ame>');
}
ch_vbu();