$(function(){
	positionFooter(); 
	function positionFooter(){
		var mypos = $(window).scrollTop()+$(window).height()-$("#scrollDiv").height();
		if(mypos < 500) mypos = 500;
		$("#scrollDiv").css({position: "absolute",top:(mypos)+"px"})	
	}
 
	$(window)
		.scroll(positionFooter)
		.resize(positionFooter)
});