function go(url)
{
  var newWindow
  var xMax
  var yMax
  var xOffset
  var yOffset
  xMax = screen.width
  yMax = screen.height
  xOffset = (xMax-350)/2;
  yOffset = (yMax-425)/2;
  newWindow = window.open(url,'','Height=425,width=350,screenX='+xOffset+',screenY='+yOffset+',top='+yOffset+',left='+xOffset+',resizeable=yes,scrollbars=no,toolbar=no,status=no,directories=no,menubar=no,location=no');
  newWindow.focus();
}