$(document).ready(function(){

//#######  Jquery dropdown navigation #########//
var timeout    = 500;
var closetimer = 0;
var ddmenuitem = 0;

function Navigation_open()
{  Navigation_canceltimer();
   Navigation_close();
   ddmenuitem = $(this).find('ul').css('visibility', 'visible');}

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

function Navigation_timer()
{  closetimer = window.setTimeout(Navigation_close, timeout);}

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

$(document).ready(function()
{  $('#Navigation > li').bind('mouseover', Navigation_open)
   $('#Navigation > li').bind('mouseout',  Navigation_timer)});

document.onclick = Navigation_close;

});