$(document).ready(function(){
 	$('#menu a').hover(	
	 	function(){ 
 		 	var nav_src = "/graphics/redesign2010/sub/nav/";
 			nav_src += $(this).attr('id') + "-roll.jpg"
  			$(this).find('img').attr('src',nav_src);
 		},
 		function(){
			var nav_src = "/graphics/redesign2010/home-nav/clearDot.gif";
			$(this).find('img').attr('src',nav_src);
 		}
 	); 		
 });