<select> click help

[UnknownPlayer]

Can someone tell me how can i put when click on some value on <select>, to put new <select> list new to this list with sub items?

[UnknownPlayer]

This is the code, when i click on this <select> i wonna to appear new <select>, next to first one, with new items.

Any idea how i can do that?

 

<p><b>Departman:</b> <select name="departmani">
    <?php
        echo "<option value=\"izaberi\">-- Izaberite Departman</option>";
        $query = "SELECT * FROM departmani";
        $result = mysql_query($query, $connection);
        for ($i = 0; $i < mysql_num_rows($result); $i++) {
            $dep = mysql_result($result, $i, "departman");
            echo "<option value=\"{$dep}\">{$dep}</option>";

        }
    ?>
</select></p>