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;