function showArea( set_to, img ){
        set_to ? $('#'+img).attr("class","area on") : $('#'+img).attr("class","area off");
}

function MenuLinks() {
	   $("menu > li > a").hover(
	     function(){
	       showArea(true, $(this).attr("class"));
	     },
	     function(){
  	     showArea(false, $(this).attr("class"));
  	   }
	   );
}

addDOMLoadEvent(MenuLinks);