retrieve value for hidden field

DATABASE
 
mysql_select_db($database_conn, $conn);
$query_Recordset1 = "SELECT user_usr.name_usr, user_usr.id_usr, contact_frm.idusr_frm, contact_frm.from_frm, contact_frm.subject_frm, contact_frm.to_frm, contact_frm.date_frm, contact_frm.read_frm FROM (contact_frm LEFT JOIN user_usr ON user_usr.name_usr=contact_frm.to_frm) ";
$Recordset1 = mysql_query($query_Recordset1, $conn) or die(mysql_error());
$row_Recordset1 = mysql_fetch_assoc($Recordset1);
$totalRows_Recordset1 = mysql_num_rows($Recordset1);
 
mysql_select_db($database_conn, $conn);
$query_Recordset2 = "SELECT id_usr, name_usr FROM user_usr";
$Recordset2 = mysql_query($query_Recordset2, $conn) or die(mysql_error());
$row_Recordset2 = mysql_fetch_assoc($Recordset2);
$totalRows_Recordset2 = mysql_num_rows($Recordset2);
 
--------------------------------------------------------------
 
FORM
 
<select name="to_frm_<?php echo $cnt1; ?>" id="to_frm_<?php echo $cnt1; ?>">
                            <option value=""><?php echo NXT_getResource("Select one..."); ?></option>
                            <?php 
do {  
?>
                            <option value="<?php echo $row_Recordset2['name_usr']?>"<?php if (!(strcmp($row_Recordset2['id_usr'], $row_rscontact_frm['to_frm']))) {echo "SELECTED";} ?>><?php echo $row_Recordset2['name_usr']?></option>
                            <?php
} while ($row_Recordset2 = mysql_fetch_assoc($Recordset2));
  $rows = mysql_num_rows($Recordset2);
  if($rows > 0) {
      mysql_data_seek($Recordset2, 0);
	  $row_Recordset2 = mysql_fetch_assoc($Recordset2);
  }
?>
                          </select>
                              <?php echo $tNGs->displayFieldError("contact_frm", "to_frm", $cnt1); ?> </td>
                        </tr>
                        <tr>
                          <td class="KT_th"><label for="subject_frm_<?php echo $cnt1; ?>">Subject:</label></td>
                          <td><input type="text" name="subject_frm_<?php echo $cnt1; ?>" id="subject_frm_<?php echo $cnt1; ?>" value="<?php echo KT_escapeAttribute($row_rscontact_frm['subject_frm']); ?>" size="32" maxlength="255" />
                              <?php echo $tNGs->displayFieldHint("subject_frm");?> <?php echo $tNGs->displayFieldError("contact_frm", "subject_frm", $cnt1); ?> </td>
                        </tr>
                        <tr>
                          <td class="KT_th"><label for="date_frm_<?php echo $cnt1; ?>">Date:</label></td>
                          <td><input name="date_frm_<?php echo $cnt1; ?>" id="date_frm_<?php echo $cnt1; ?>" value="<?php echo KT_formatDate($row_rscontact_frm['date_frm']); ?>" size="10" maxlength="22" wdg:subtype="Calendar" wdg:mask="<?php echo $KT_screen_date_format; ?>" wdg:type="widget" wdg:mondayfirst="false" wdg:singleclick="true" wdg:restricttomask="yes" wdg:readonly="true" />
                              <?php echo $tNGs->displayFieldHint("date_frm");?> <?php echo $tNGs->displayFieldError("contact_frm", "date_frm", $cnt1); ?> </td>
                        </tr>
                        <tr>
                          <td class="KT_th"><label for="message_frm_<?php echo $cnt1; ?>">Message:</label></td>
                          <td><textarea name="message_frm_<?php echo $cnt1; ?>" cols="50" rows="5" id="message_frm_<?php echo $cnt1; ?>" wdg:subtype="RestrictedTextArea" wdg:type="widget" wdg:maxchars="255" wdg:showcount="true" wdg:showmessage="true"><?php echo KT_escapeAttribute($row_rscontact_frm['message_frm']); ?></textarea>
                              <?php echo $tNGs->displayFieldHint("message_frm");?> <?php echo $tNGs->displayFieldError("contact_frm", "message_frm", $cnt1); ?> </td>
                        </tr>
                      </table>
<input type="hidden" name="from_frm_<?php echo $cnt1; ?>" id="from_frm_<?php echo $cnt1; ?>" value="Admin" />
<input type="hidden" name="read_frm" value="1" />
<input type="hidden" name="idusr_frm" id="idusr_frm" value="<?php if (isset($_POST['to_frm'])) {
qry = mysql_query("SELECT * FROM `user_usr` WHERE `name_usr` = '{$_POST['to_frm']}'");} echo $qry['id_usr'];?>"/>