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(){
	        $('#navbar > li').bind('mouseover', jsddm_open)
		$('#navbar > li').bind('mouseout',  jsddm_timer)
	});
					
	document.onclick = jsddm_close;