$(document).ready(function(){
	$(".ad-wrapper").height($(".col-subleft").height());
	$(window).scroll(function(){
		checkScroll();
	});
	checkScroll();
});
	
function checkScroll(){
	if($(window).scrollTop() < $('.ad-wrapper').offset().top){
		$(".ads-col").css({'position':'relative','top':0});
		return;
	}
	
	$(".ads-col").css({'position':'fixed','top':0});
}