var Utils = {
  initialize: function() {
    if($('js_acceptCGV')) { $('js_acceptCGV').observe('click', Utils.acceptCGV); }
  },
  acceptCGV: function() {
    if($('js_acceptCGV').checked == true) {
      $('js_valider').disabled = false;
    } else {
      $('js_valider').disabled = true;
    }
  }
}

Event.observe(window,"load", Utils.initialize);