Select HTML

<select onchange=\"window.open(this.options[this.selectedIndex].value,'_self')\">
<option value=\"file.php?op=shoping_user_level&id=$id&status=1">Normal</option>
<option value=\"file.php?op=shoping_user_level&id=$id&status=2">Basic</option>
<option value=\"file.php?op=shoping_user_level&id=$id&status=3">Standard</option>
<option value=\"file.php?op=shoping_user_level&id=$id&status=4">Premium</option>
</select>