var root_dir='https://yoxel.com';
var popup_warn='Your browser is currently set up to block pop-up windows.\nSince our application uses those, please enable pop-ups\nfor this site and reload the page.';

function regc_win_open(){
  var nWin, URL = '';

  URL = root_dir + '/register_contact.php?csig=cfd4f47&ccn=public&close=1';
  nWin = window.open(URL, 'sup_regc', 'menubar=1,resizable=1,scrollbars=1,' + getXY(700, 480, 'sup_regc'));
  if (!nWin) return alert(popup_warn);
  nWin.focus();
}