var name = ".half-banner";
var menuYloc = null;

$(document).ready(function(){
	//menuYloc = parseInt($(name).css("top").substring(0,$(name).css("top").indexOf("px")));
	menuYloc = Math.round($(name).offset().top);
	//alert(menuYloc);
	//var topOffset = 10;
	$(window).scroll(function () {
		if (menuYloc < $(document).scrollTop()){
			var offset = ($(document).scrollTop()-menuYloc)+"px";
		}else{
		//alert (menuYloc)
			var offset = "0px";
		}
		$(name).animate({top:offset},{duration:300,queue:false});
	});
});