Necesito que el Select cumpla…

[anubisdp]

<form name="form1" action="">
<select name="Select1" class="texta" onchange="change_action(this.value)">
<option value="1">No</option>
<option value="2">Si</option>
</select>
<input name="Submit" type="submit" value="Enviar" />
</form>
<script type="text/javascript">
function change_action(valor){
if(valor=="1")
document.form1.action="censo7.php";
else if(valor=="2")
document.form1.action="censo2.php";
}
</script>