[Stasik]

Если быть ещё точнее:

      <form name="form1" method="get" action="default.php?category=2&page=2&sub=3">
        <select name="select" size="1">
          <option value="1" selected>Austrian</option>
          <option>Belarus</option>
          <option>Belgian</option>
        </select>
       <input type="hidden" name="category" value="<? echo $category; ?>">
       <input type="hidden" name="page" value="<? echo $page; ?>">
       <input type="hidden" name="sub" value="<? echo $sub; ?>">

        <input type="submit" name="Submit" value="Submit">
      </form> 
      <? if($select=="1") {
        echo " Austrian "; 
        }
        ?>