var name = "#popup";
var menuYloc = null;
	
$(document).ready(function(){
	menuYloc = parseInt($(name).css("top").substring(0,$(name).css("top").indexOf("px")))
	$(window).scroll(function () { 
		offset = menuYloc+$(document).scrollTop()+"px";
		$(name).animate({top:offset},{duration:500,queue:false});
	});
}); 

function closeDiv()
{
	document.getElementById("popup").style.display="none";
}

window.onload = function()
{
	var el = document.getElementById("popup");
	
	if (el)
	el.style.display = "block";
}

setTimeout("closeDiv()", 6000);