// JavaScript Document
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()
{  $('#topnav > ul > li').bind('mouseover', jsddm_open)
   $('#topnav > ul > li').bind('mouseout',  jsddm_timer)});

document.onclick = jsddm_close;