function onPopup(url) {
  window.open(url, '', 'scrollbars=yes,width=500,height=490');
}

function supportJS() {
  var name = navigator.appName;
  var vers = navigator.appVersion;
  vers = vers.substring(0,1);
  var ie = (document.all) ? true : false;
  var ns = (document.layers) ? true : false;
  var ns3 = ((name == "Netscape") && (vers < 4)) ? true : false;
  var ns4 = ((name == "Netscape") && (vers == 4)) ? true : false;
  var ns5 = ((name == "Netscape") && (vers > 4)) ? true : false;
  var iver = navigator.appVersion.substring(22,23);
  var ie4 = (ie && iver==4) ? true : false;
  var ie5 = (ie && iver>4) ? true : false;
  var old = ( ((name == "Internet Explorer") && (vers == 3)) || (vers < 3) ) ? true : false;
  return ns4 || ns5 || ie4 || ie5;
}