if (document.images)
{
 var home_a = new Image();
 var home_b = new Image();
 home_a.src = "/gfx/menuhomea.gif";
 home_b.src = "/gfx/menuhomeb.gif";
 var about_a = new Image();
 var about_b = new Image();
 about_a.src = "/gfx/menuabouta.gif";
 about_b.src = "/gfx/menuaboutb.gif";
 var port_a = new Image();
 var port_b = new Image();
 port_a.src = "/gfx/menuporta.gif";
 port_b.src = "/gfx/menuportb.gif";
 var test_a = new Image();
 var test_b = new Image();
 test_a.src = "/gfx/menutesta.gif";
 test_b.src = "/gfx/menutestb.gif";
 var contact_a = new Image();
 var contact_b = new Image();
 contact_a.src = "/gfx/menucontacta.gif";
 contact_b.src = "/gfx/menucontactb.gif";
}

 function ChangeImg(imgNa,imgNo)
 {
   if (document.images) document.images[imgNo].src = eval(imgNa + ".src");
 }

function popUp(id, e)
{
  var elm = null;
  var x = 0;
  var y = 0;

  if (e.pageY)
  {
    x = e.pageX;
    y = e.pageY; 
  }
  else if (e.clientX)
  {
    x = e.clientX;
    y = e.clientY;

    if (!top.opera)
    {
      if ((!window.document.compatMode) || (window.document.compatMode == 'BackCompat'))
      {
        x += window.document.body.scrollLeft;
        y += window.document.body.scrollTop;
      }
      else
      {
        x += window.document.documentElement.scrollLeft;
        y += window.document.documentElement.scrollTop;
      }
    }
  }
  else return;

  var ww=0, wh=0;
  if (typeof(window.innerWidth) == 'number')
  {
    ww = window.innerWidth;
    wh = window.innerHeight;
  }
  else if (document.documentElement && document.documentElement.clientWidth)
  {
    ww = document.documentElement.clientWidth;
    wh = document.documentElement.clientHeight;
  }
  else if(document.body && document.body.clientWidth)
  {
    ww = document.body.clientWidth;
    wh = document.body.clientHeight;
  }

  var sx=x, sy=y;
  if (typeof(window.pageYOffset) == 'number')
  {
    sx = x - window.pageXOffset;
    sy = y - window.pageYOffset;
  }
  else if (document.body && (document.body.scrollLeft || document.body.scrollTop))
  {
    sx = x - document.body.scrollLeft;
    sy = y - document.body.scrollTop;
  }
  else if (document.documentElement && (document.documentElement.scrollLeft || document.documentElement.scrollTop))
  {
    sx = x - document.documentElement.scrollLeft;
    sy = y - document.documentElement.scrollTop;
  }

  x-=235;
  y+=15;

  if (sx<250) x+=(250-sx);
  if (ww>0)
  {
   if (sx+15+16 > ww)
   {
    x-=(sx-ww+16+15);
   }
  }

  if (wh>0)
  {
   if (sy+30 > wh)
   {
    y-=sy;
   }
  }

  if (document.getElementById)
  {
    elm = document.getElementById(id);
    elm = document.getElementById(id);
  }
  else if (document.all)
  {
    elm = document.all[id];
    elm = document.all[id];
  }
  else if (document.layers)
  {
    elm = document.layers[id];
    elm = document.layers[id];
  }

  if (!elm)
  {
  }
  else if (elm.style)
  {
    if (typeof(elm.style.left) == 'number')
    {
      elm.style.left = x;
      elm.style.top  = y;
    }
    else
    {
      elm.style.left = x + 'px';
      elm.style.top  = y + 'px';
    }

    elm.style.visibility="visible";
  }
  else if (typeof(elm.left) == 'number')
  {
    elm.left = x;
    elm.top  = y;
    elm.visibility="visible";
  }
}

function hidePopUp(id)
{
  if (document.getElementById)
  {
    elm = document.getElementById(id);
    elm = document.getElementById(id);
  }
  else if (document.all)
  {
    elm = document.all[id];
    elm = document.all[id];
  }
  else if (document.layers)
  {
    elm = document.layers[id];
    elm = document.layers[id];
  }

  if (!elm)
  {
  }
  else if (elm.style)
  {
    elm.style.visibility="hidden";
  }
  else if (typeof(elm.left) == 'number')
  {
    elm.visibility="hidden";
  }
}