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

function nav1_open()
{  nav1_canceltimer();
   nav1_close();
   ddmenuitem = $(this).find('ul').css('visibility', 'visible');}

function nav1_close()
{  if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');}

function nav1_timer()
{  closetimer = window.setTimeout(nav1_close, timeout);}

function nav1_canceltimer()
{  if(closetimer)
   {  window.clearTimeout(closetimer);
      closetimer = null;}}

$(document).ready(function()
{  $('#nav1 > li').bind('mouseover', nav1_open)
   $('#nav1 > li').bind('mouseout',  nav1_timer)});

document.onclick = nav1_close;

function nav2_open()
{  nav2_canceltimer();
   nav2_close();
   ddmenuitem = $(this).find('ul').css('visibility', 'visible');}

function nav2_close()
{  if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');}

function nav2_timer()
{  closetimer = window.setTimeout(nav2_close, timeout);}

function nav2_canceltimer()
{  if(closetimer)
   {  window.clearTimeout(closetimer);
      closetimer = null;}}

$(document).ready(function()
{  $('#nav2 > li').bind('mouseover', nav2_open)
   $('#nav2 > li').bind('mouseout',  nav2_timer)});

document.onclick = nav2_close;