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

    function mainNavigation_open()
    {  mainNavigation_canceltimer();
       mainNavigation_close();
       ddmenuitem = $(this).find('ul').css('display', 'block');}

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

    function mainNavigation_timer()
    {  closetimer = window.setTimeout(mainNavigation_close, timeout);}

    function mainNavigation_canceltimer()
    {  if(closetimer)
       {  window.clearTimeout(closetimer);
          closetimer = null;}}
    
    function goHome()
    {
      window.location = "/hme/hme.aspx";
    }

    $(document).ready(function()
    {  $('#mainNavigation > li').bind('mouseover', mainNavigation_open);
       $('#mainNavigation > li').bind('mouseout',  mainNavigation_timer);

       $('#header > h1').bind('click', goHome).css({"cursor":"pointer"}); 
            
              
    });

    document.onclick = mainNavigation_close;