PHP - Seleccionar y visualizar automaticamente

<form id="currency_form" action="<?php echo vmURI::getCurrentUrlBy('get',true) ?>" method="post">

    <?php echo JHTML::_('select.genericlist', $currencies, 'virtuemart_currency_id', 'class="inputbox vm-chzn-select"', 'virtuemart_currency_id', 'currency_txt',  $virtuemart_currency_id)  ; ?>

    <input type="submit" name="submit" value="<?php echo vmText::_("Enviar") ?>">

</form>

<?php // no direct access

defined('_JEXEC') or die('Restricted access');

vmJsApi::jQuery();

vmJsApi::chosenDropDowns();

?>

<!-- Currency Selector Module -->

<?php echo $text_before ?>

<form action="<?php echo vmURI::getCurrentUrlBy('get',true) ?>" method="post">

	<?php echo JHTML::_('select.genericlist', $currencies, 'virtuemart_currency_id', 'class="inputbox vm-chzn-select changeSendForm"', 'virtuemart_currency_id', 'currency_txt', $virtuemart_currency_id) ; ?>

</form>

<?php

$j = 'jQuery(document).ready(function() {

jQuery(".changeSendForm")

	.off("change",Virtuemart.sendCurrForm)

    .on("change",Virtuemart.sendCurrForm);

})';

vmJsApi::addJScript('sendFormChange',$j);

echo vmJsApi::writeJS();