function setUpAds(){ads=$$('.slinks li');ad_count=ads.length;ads.each(function(ad_link){ad_link.observe('click',function(evt){var link=evt.findElement('a');var ad_position=ads.indexOf(link.up('li'))+1;link.href=link.href+'?cur_page='+cur_page+'&ad_count='+ad_count+'&ad_position='+ad_position;return true;});});}