if(navigator.appName == "Netscape"){ document.captureEvents(Event.SCROLL); }

xx = window.setInterval("setter()",100); //netscape & ie mousewheel fix

function setter(){
 if(document.getElementById('topRet')){ //topRet disabled in Opera, so this is the necessary existence check
 document.getElementById('topRet').style.top = parseFloat(document.body.parentNode.scrollTop) + "px";
 }
}