// show/hide payment info
document.addEvent("domready", function(){
  var subcriber_check = document.getElement('li.field_become_subscriber').getElement('input[type=checkbox]');
  document.getElement('li.field_pay').setStyle('display','none');
  document.getElement('li.field_become_subscriber').setStyle('display','none');
  document.getElement('li.field_is_subscriber').getElements('input[type=radio]').each(function(oEl){
    oEl.addEvent('click',function(){
       if(!subcriber_check.get('checked'))
         document.getElement('li.field_pay').setStyle('display', (this.get('value') == "Ja") ? 'none':'block');
       document.getElement('li.field_become_subscriber').setStyle('display', (this.get('value') == "Ja") ? 'none':'block');
    });
  });
  subcriber_check .addEvent('click',function(){
    document.getElement('li.field_pay').setStyle('display', this.get('checked') ? "none" : "block");
    if (this.get('checked')) {
      document.getElement('li.field_pay').getElements('input[type=radio]').set('checked',false);
    }
  });
  
  
});