function openpage(pageHref) {

  var width = 520;
  var height = 450;
  var left = Math.floor((screen.width - width)/2);
  var top = Math.floor((screen.height - height)/2);

  newWindow=window.open(pageHref,'newwin','toolbar=no,width='+width+',height='+height+',top='+top+',left='+left+',scrollbars=no,resizable=no');
  if (newWindow) {
    if (parseInt(navigator.appVersion) >= 4) { newWindow.focus(); }
    return false;
  }
  return true;
}