var linkWin=0;

function linkWindow(URLStr)

{

  if(linkWin)

  {

    if(!linkWin.closed) linkWin.close();

  }

  linkWin = open(URLStr, 'linkWin', 'toolbar=yes,location=yes,directories=yes,status=yes,menubar=yes,scrollbars=yes,resizable=yes,copyhistory=yes,width=800,height=600,left=10, top=10,screenX=10,screenY=10');

}