var supportWindow=0;
function launchSupport(URLStr, left, top, width, height)
{
  if(supportWindow)
  {
    if(!supportWindow.closed) supportWindow.close();
  }
  supportWindow = open(URLStr, 'supportWindow', 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=no,copyhistory=yes, width='+width+', height='+height+', left='+left+', top='+top+', screenX='+left+', screenY='+top+'');
}