Submit popup?

Hvordan laver jeg sådan at Action åbner i et popup vindue når man trykker submit?

<form action="" method="post">
    <tr>
        <td><font face="verdana" size="1">Navn:</td>
        <td><input type="text" size="24" maxlength="24" name="navn">
    </tr>
                <tr>
        <td><font face="verdana" size="1">E-mail:</td>
        <td><input type="text" size="24" maxlength="50" name="emne"></td> 
          </tr>
<tr>
        <td><font face="verdana" size="1">Emne:</td>
        <td><input type="text" size="24" maxlength="50" name="emne"></td> 
          </tr>
    <tr>
        <td><font face="verdana" size="1">Besked:</td>
        <td><textarea rows="5" cols="24" name="besked"></textarea></td>
    </tr>
            <tr>
        <td><input type="submit"  value="Send">
        <td><input type="reset" value="Nulstil"> </td></tr>
   
</form>