var name = "#left";
var menuYloc = null;
var fromTop = 160;

menuYloc = parseInt($(name).css("top").substring(0,$(name).css("top").indexOf("px")));

scrollMenu();

$(window).scroll(function () {
	
	scrollMenu();
});

function scrollMenu() {
	
	var offset = menuYloc+$(document).scrollTop();
	
	if(offset > fromTop) {
		
		offset -= fromTop;
		$(name).animate({top:offset+"px"},{duration:300, queue:false}, {easing: 'easeOutExpo'});
	} else {
		
		offset = menuYloc;
		$(name).animate({top:offset+"px"},{duration:300,queue:false}, {easing: 'easeOutExpo'});
	}
}