Radio group and textarea selection

Unfortunately it is not on Internet. But part of the code is this:

if ((isset($_POST["MM_update"])) && ($_POST["MM_update"] == "form1")) {

  $updateSQL = sprintf("UPDATE sarcini SET solutie_6=%s, introd_6=%s WHERE id_question=%s",

                       GetSQLValueString($_POST['Proposal_text'], "text"),

                       GetSQLValueString($_POST['Full_name'], "text"),

                       GetSQLValueString($_POST['id_question'], "int"));

  mysql_select_db($database_dbconfig, $dbconfig);

  $Result1 = mysql_query($updateSQL, $dbconfig) or die(mysql_error());

  $updateGoTo = "Search_answer.php";

  if (isset($_SERVER['QUERY_STRING'])) {

    $updateGoTo .= (strpos($updateGoTo, '?')) ? "&" : "?";

    $updateGoTo .= $_SERVER['QUERY_STRING'];

  }

  header(sprintf("Location: %s", $updateGoTo));

}

And than:

<INPUT name="Proposal" type="radio" id="Proposal_0" value="No answer." checked="CHECKED">

                No answer.

                </label>

            </div>

              <p align="left">

                  <label>

                <INPUT name="Proposal" type="radio" id="Proposal_2" value="E-mail answer.">

                E-mail proposal</label>

        </p>

            <p align="left">

              <label>

                <INPUT name="Proposal" type="radio" id="Proposal_1" value="I have this answer:">

                I have this answer:</label>

            </p>

            <p>

              <label for="Proposal_text"></label>

              <textarea name="Proposal_text" id="Proposal_text" cols="50" rows="6"></textarea>

I would like to update with: "No answer." , "E-mail answer." or, if  id="Proposal_1" is checked, with the values entered by user in textarea "Proposal_text".