getting value from dropdown in php

how to i get the selected value from the dropdown and assign form action to it

here is my code :

    <form id="form" action"test.php" method="post">
        <select id="bok_name" name="bok_name">
            <?php while($row = mysql_fetch_array($result)) {
        echo '<option value='.$row['bok_name'].'>'.$row['bok_name'].'</option>'; 
        } ?>
        </select>
    </form>

    <form action="<?php $filed = $_post['bok_name'];
    if($filed = 'new life') echo "http://www.google.com"?> method="post">
        <input type="submit" value="check" name="check"/>
    </form>