Semplice problema con <select>

[Samleo]

Intanto la select la farei così:

<script>
function Redirect(val)
{
   location.href = 'http://www.indirizzo_pagina.it/'+val+'.php';
}
</script>
<form method="post" action="">
<select style="width: 180px;"  id="language-select-list" onchange="Redirect(this.value)">

<option value='inglese'>English</option>
<option value='italiano'>Italiano</option>
<option value='francese'>Français</option>

</select>
</form>