window.addEvent('domready', function(){
		$('drop_down_menu').getElements('li.menu').each( function( elem ){
			var list = elem.getElement('ul.links');	
			var myFx = new Fx.Slide(list).hide();			
			elem.addEvents({
				'mouseenter' : function(){ 					
					elem.style.backgroundImage = "url('/fyi2009/fireworks_source/menu_on.png')";
					myFx.cancel();
					myFx.slideIn();					
				},
				'mouseleave' : function(){ 
					elem.style.backgroundImage = "url('/fyi2009/fireworks_source/menu_off.png')";
					myFx.cancel();
					myFx.slideOut();					
					set_active(current);
				}
			});	

		})

}); 




function set_active(obj)
{
	current=obj;
	obj2=document.getElementById(current);
        obj2.style.backgroundImage = 'url(/fyi2009/fireworks_source/menu_on.png)';
}