function popUpWindow(URLStr, Name, width, height)
{
  var left = (screen.width/2) - width/2;
  var top = (screen.height/2) - height/2;
	
  popUpWin = open(URLStr, Name, 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
}

function popUpMovie(URLStr, Name, width, height)
{
  popUpWin = open(URLStr, Name, 'toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=yes,copyhistory=yes,width='+width+',height='+height+'');
  if(popUpWin==null)
  {	
  	alert ("Unable to open movie window.  If you're using a popup-blocker, please add this site to your trusted list, or disable the blocker while viewing the tours.");
  }
}