function PopWin(url, width, height, sb, rsz)
{
  var sw = screen.width;
  var sh = screen.height;

  if(width > sw - 24) 
  {
    width = sw - 24;
    sb = 'yes';
    rsz = 'yes';
  }
  if (height > sh - 140)
  {
    height = sh - 140;
    sb = 'yes';
    rsz = 'yes';
  }

  var left = (sw - width)/2 - 8;
  var top = (sh - height)/2 - 66;
  if(top < 1) top = 1;

window.open(url,'','left='+left+',top='+top+',height='+height+',width='+width+',screenX='+width+',screenY='+height+',toolbar=0,scrollbars='+sb+',resizable='+rsz+',location=0,statusbar=0,menubar=0');
}