Код:
<form name="form1" method="get" action="default.php">
<select name="select" size="1">
<option value="1" selected>Austrian</option>
<option>Belarus</option>
<option>Belgian</option>
</select>
<input type="hidden" name="category" value="2">
<input type="hidden" name="page" value="2">
<input type="hidden" name="sub" value="3">
<input type="submit" name="Submit" value="Submit">
</form>
<? if($select=="1") {
echo " Austrian ";
}
?>
Вот так она должна работать