<form method="post" action="./index.cgi">
    <input type="hidden" name="page" value="500">
    <table>

    <tr>
        <td>Keywords</td>
        <td><input type="text" name="keywords" value=""></td>
    </tr>

    <tr>
        <td>authors</td>
        <td><input type="text" name="authors" value=""></td>
    </tr>

    <tr>
        <td>research group</td>
        <td><input type="text" name="department" value=""></td>
    </tr>

    <tr>
        <td><input type="submit" value="submit"></td>
    </tr>
    </table>
</form>