function popurl(link, width, height)
{
  var externalWindow;

  externalWindow = window.open(link,"external",'toolbar,location,directories,status,menubar,scrollbars,resizable,left=0,top=0,width='+width+',height='+height);
  externalWindow.focus();
}


function changeImages() 
{
  if (document.images) 
  {
    for (var i=0; i < changeImages.arguments.length; i+=2) 
    {
      document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
    }
  }
}