jQuery.preloadImages = function()
{
  for(var i = 0; i<arguments.length; i++)
  {
    jQuery("<img>").attr("src", arguments[i]);
  }
}

$.preloadImages("/images/menu-sel_02.gif", "/images/menu-sel_04.gif","/images/menu-sel_06.gif","/images/menu-sel_08.gif");

$(document).ready(function(){

    $("a.menu-item img").mouseover(	function(){
	if (this.className=='selected') return;
	this.src = this.src.replace('menu_', 'menu-sel_');
    }).mouseout(function(){
	if (this.className=='selected') return;
	this.src = this.src.replace('menu-sel_', 'menu_');
    });

});