var timeout    = 0;
var closetimer = 0;
var ddmenuitem = 0;
var dditem 		 = 0;

function menu_open() {  
		menu_canceltimer();
		menu_close();
		$(this).addClass("seleccionado");
		ddmenuitem = $(this).find('ul').css('visibility', 'visible');
		dditem = this;
}

function menu_close() {  		
	if(ddmenuitem) {			
			$(dditem).removeClass("seleccionado");
			ddmenuitem.css('visibility', 'hidden');			
			dditem = 0;
	}	
}

function menu_timer() {  
		closetimer = window.setTimeout(menu_close, timeout);
}

function menu_canceltimer() {  
		if(closetimer) {  
				window.clearTimeout(closetimer);
				closetimer = null;
		}
}