Así lo hago yo, Se aceptan sugerencias.
'javascript' => '
{literal}
<script type="text/javascript">
jQuery(function(){
//letradni
letradni();
});
jQuery(function(){
//calculoiban
controliban();
});
</script>
{/literal}
',
'includes' =>
array (
0 =>
array (
'file' => 'custom/js/letra_dni.js',
),
1 =>
array (
'file' => 'custom/js/bancos.js',
),
),