Código PHP:
<?php include "form_items.php"; ?>
<form name="viajes" id="buscador" action="http://wftc2.e-travel.com/plnext/AIEBCDSBCDS/Override.action" method="GET" onSubmit="return enviar();">
<input type="hidden" name="EMBEDDED_TRANSACTION" value="AirAvailability">
<input type="hidden" name="LANGUAGE" value="ES">
<input type="hidden" name="SITE" value="BCDSBCDS">
<input type="hidden" name="TRIPFLOW" value="YES">
<p>Origen:<? $arr_txt=array('Sofia', 'Madrid', 'Barcelona');
$arr_vals=array('SOF', 'MAD', 'BCN');?>
<?=frm_select ('B_LOCATION_1', $arr_txt, $arr_vals) ?>
</p>
<p>Destino:<? $arr_txt=array('Sofia', 'Madrid', 'Barcelona');
$arr_vals=array('SOF', 'MAD', 'BCN');?>
<?=frm_select ('E_LOCATION_1', $arr_txt, $arr_vals) ?>
</p>
<p>Solo Ida:
<?= frm_radio('TRIP_TYPE', 'O')?>
</p>
<p>Ida y Vuelta:
<?= frm_radio('TRIP_TYPE', 'R')?>
</p>
<select id="mes">
<option value="200801">enero</option>
<option value="200802">febrero</option>
<option value="200803">marzo</option>
<option value="200804">abril</option>
<option value="200805">mayo</option>
<option value="200806">junio</option>
</select>
<select id="dia">
<option value="010000">01</option>
<option value="020000">02</option>
<option value="030000">03</option>
<option value="040000">04</option>
<option value="050000">05</option>
<option value="060000">06</option>
</select>
<input type="hidden" name="B_DATE_1" value="">
<input type="hidden" name="AIRLINE_1" id="AIRLINE_1" value='FB'>
<input type="hidden" name="B_ANY_TIME_1" id="B_ANY_TIME_1" value='TRUE'>
<input type="submit" value="Enviar">
</form>
<script type="text/javascrit">
<!--
function enviar()
{
document.forms.viajes.B_DATE_1.value = '' + document.getElementById('mes').value + document.getElementById('dia').value;
if (document.forms.viajes.B_DATE_1.value != '') return true;
else return false;
}
-->
</script>
Aquí os dejo el código