window.addEvent("domready",function(){

	if(document.id('submenu')){
		var li = $$('li.last')[0];
		var submenu = $('submenu');
		li.addEvent('mouseenter',function(){
			submenu.setStyle('display','block');
		});
		li.addEvent('mouseleave',function(){
			submenu.setStyle('display','none');
		});
		
		submenu.addEvent('mouseenter',function(){
			submenu.setStyle('display','block');
		});
		submenu.addEvent('mouseleave',function(){
			submenu.setStyle('display','none');
		});
	}
	
});