window.addEvent ("load", function() {
	if($jsmart("#yt_menuwrap")){
		offset_top = $jsmart("#yt_menuwrap").offset().top
		processScroll("#yt_menuwrap", "menu-fixed", offset_top);
		$jsmart(window).scroll(function(){
			processScroll("#yt_menuwrap", "menu-fixed", offset_top);
		});
	}
});
function processScroll(element, eclass, offset_top, column, offset_end) {
	var scrollTop = $jsmart(window).scrollTop();
	if($jsmart(element).height()< $jsmart(window).height()){
		if (scrollTop >= offset_top) {
			$jsmart(element).addClass(eclass);
		} else if (scrollTop <= offset_top) {
			$jsmart(element).removeClass(eclass);
		}
		if(column){
			if(scrollTop + $jsmart(element).height() > offset_end){
				$jsmart(element).removeClass(eclass);
			}
		}
	}
}