protected function _initConfigForm(Am_Form $form)
{
$period = $form->addSelect('period')->setLabel(___('Period'))->loadOptions(array_merge($this->getDi()->interval->getOptions(), array(self::PERIOD_EXACT => ___('Exact'))));
$period_exact = self::PERIOD_EXACT;
$script = <<<CUT
\$(function(){
\$('select[name=period]').change(function(){
\$(this).closest('.am-form').find('input[name=start], input[name=stop]').
closest('div.row').
toggle(\$(this).val() == '{$period_exact}');
}).change();
})
CUT;
$form->addScript()->setScript($script);
$start = $form->addElement('Date', 'start')->setLabel(___('Start'));
$start->addRule('required');
$stop = $form->addElement('Date', 'stop')->setLabel(___('End'));
$stop->addRule('required');
$form->addRule('callback', 'Start Date cannot be later than the End Date', array($this, 'checkStopDate'));
$quant = $form->addElement('Select', 'quant')->setLabel(___('Quantity'));
$quant->addRule('required');
$quant->loadOptions($this->getQuantityOptions());
}
