Filter Date custom filed

case 'calendar':
if(!empty($v)){
if(is_array($v)){
if(!empty($v['from']) && !empty($v['to'])){
$where = '(field_id = '.$k.' AND `value` BETWEEN "'.$v['from'].' 00:00:00" AND "'.$v['to'].' 00:00:00")';
}
else if(!empty($v['from'])){
$where = '(field_id = '.$k.' AND `value` >= "'.$v['from'].' 00:00:00")';
}
else if(!empty($v['to'])){
$where = '(field_id = '.$k.' AND `value` <= "'.$v['to'].' 00:00:00")';
}
}
else{
$where = '(field_id = '.$k.' AND value LIKE '.$db->quote('%'.$v.'%').')';
}
}
break;

case 'calendar':
$options = HTMLHelper::_('select.option', 'calendar', Text::_('PLG_JLCONTENTFIELDSFILTER_FILTER_CALENDAR'));
break;

form.find('input[type="text"], input[type="date"]').val('');

var els = form.querySelectorAll('input[type="text"], input[type="date"]');