var timeout    = 500;
var closetimer = 0;
var ddmenuitem = 0;

function mainmenu_open()
{  mainmenu_canceltimer();
   mainmenu_close();
   ddmenuitem = $(this);
   ddmenuitem.addClass('over');
}

function mainmenu_close()
{  if(ddmenuitem) {
		ddmenuitem.removeClass('over');
	}
}

function mainmenu_timer()
{closetimer = window.setTimeout(mainmenu_close, timeout);}

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

$(document).ready(function()
{  
   $('#meta-nav > ul > li').bind('mouseover', mainmenu_close);

   $('#top-nav > ul > li').bind('mouseover', mainmenu_open);
   $('#top-nav > ul > li').bind('mouseout',  mainmenu_timer);

   $('#lang-nav > ul > li').bind('mouseover', mainmenu_open);
   $('#lang-nav > ul > li').bind('mouseout',  mainmenu_timer);

   $('#main-nav > ul > li').bind('mouseover', mainmenu_open);
   $('#main-nav > ul > li').bind('mouseout',  mainmenu_timer);

});

document.onclick = mainmenu_close;