function showwin(evt, txt)
{
	evt = evt ? evt : ((window.event) ? window.event : null);
	var obj =  document.getElementById('win');
	
  if (obj)
  {
    if (txt)
    {
      obj.childNodes[0].nodeValue = txt;
      obj.style.posLeft = obj.style.left = obj.style.pixelLeft = (document.body.scrollLeft + evt.clientX) + 'px';
  		obj.style.posTop = obj.style.top = obj.style.pixelTop = (document.body.scrollTop + evt.clientY + 20) + 'px';
  		obj.style.visibility = 'visible';
    }
    else
    {
      obj.style.visibility = 'hidden';
  		obj.style.posTop = 0;
  		obj.style.posLeft = 0;
    }
  }
}


function imgOn(imgName)
{
  var id = fetch_object(imgName);
  if (id)
  {
    id.src = imgOnAr[imgName].src;
  }
}

function imgOff(imgName)
{
  var id = fetch_object(imgName);
  if (id)
  {
    id.src = imgOffAr[imgName].src;
  }
}


function fetch_object(idname)
{
  if (document.getElementById)
  {
    return document.getElementById(idname);
  }
  else if (document.all)
  {
    return document.all[idname];
  }
  else if (document.layers)
  {
    return document.layers[idname];
  }
  else
  {
    return null;
  }
}