// $Id: product.js 76 2006-09-19 21:07:26Z karthik $
function open_window(filename, w , h) {
  var l = (screen.width / 2) - (w / 2);
  var b = (screen.height / 2) - (h / 2);
  var attr = 'toolbar=no, menubar=no, resizable=yes, width=' + w + ', height=' + h + ', left=' + l + ', top=' + b;
  var popup = window.open('' + filename, 'image', attr);
  popup.focus();
}