//主菜单隐藏层的现实1
  function MM_reloadPage(init)
  {
    //reloads the window if Nav4 resized
    if (init==true) with (navigator)
    {
      if ((appName=="Netscape") && (parseInt(appVersion)==4))
      {
        document.MM_pgW = innerWidth;
        document.MM_pgH = innerHeight;
        onresize = MM_reloadPage;
      }
    }
    else
    if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH)
      location.reload();
  }

//主菜单隐藏层的现实2
  MM_reloadPage(true);

//主菜单隐藏层的现实3
  function MM_findObj(n, d)
  {
    //v4.01
    var p,i,x;

    if(!d)
      d = document;

    if((p=n.indexOf("?"))>0 && parent.frames.length)
    {
      d = parent.frames[n.substring(p+1)].document;
      n = n.substring(0,p);
    }

    if(!(x=d[n]) && d.all)
      x=d.all[n];

    for (i=0; !x && i<d.forms.length; i++)
      x = d.forms[i][n];

    for(i=0; !x && d.layers && i<d.layers.length; i++)
      x = MM_findObj(n,d.layers[i].document);

    if(!x && d.getElementById)
      x = d.getElementById(n);

    return x;
  }

//主菜单隐藏层的现实4
  function MM_showHideLayers()
  {
    //v6.0
    var i, p, v, obj, args = MM_showHideLayers.arguments;

    for (i=0; i<(args.length-2); i+=3)
      if ((obj=MM_findObj(args[i])) != null)
      {
        v = args[i+2];
        if (obj.style)
        {
          obj = obj.style;
          v = (v=='show') ? 'visible' : (v=='hide') ? 'hidden' : v;
        }
        obj.visibility = v;
      }
  }