var timeout    = 500;
var closetimer = 0;
var ddmenuitem = 0;

function jsddm_open() {
		jsddm_canceltimer();
		jsddm_close();
		ddmenuitem = $(this).find('ul').css('visibility', 'visible');
}

		function jsddm_close() {  
				if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');
		}

		function jsddm_timer() {  
				closetimer = window.setTimeout(jsddm_close, timeout);
		}

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

		$(document).ready(function() {  
				$('.menu > li').bind('mouseover', jsddm_open)
				$('.menu > li').bind('mouseout',  jsddm_timer)
		});

		document.onclick = jsddm_close;