var timeout    = 300;
var closetimer = 0;
var ddmenuitem = 0;

function jsddm_open()
{  jsddm_canceltimer();
   jsddm_close();
   ddmenuitem =jQuery(this).find('ul').css('display', 'block');}

function jsddm_close()
{  if(ddmenuitem) ddmenuitem.css('display', 'none');}

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

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

jQuery(document).ready(
	
	function()
	{ 
		
		jQuery('#nav_wrapper > li').bind('mouseover', jsddm_open)
  	jQuery('#nav_wrapper > li').bind('mouseout',  jsddm_timer)
	}

);

document.onclick = jsddm_close;