var Header = {
	addFade : function(selector){
		$("<span class=\"hover\"></span>").css("display", "none").prependTo($(selector)); 
		$(selector+" a").bind("mouseenter",function(){
			$(selector+" .hover").fadeIn("slow");
		});
		$(selector+" a").bind("mouseleave",function(){
			$(selector+" .hover").fadeOut("slow");
		});
	}
};

$(function(){
	Header.addFade("#logo_header");
});