Deleting from Multiple checkboxes

Hi… i want to delete multiple data from database, so how i can do that?? i search a lot of php coding from the internet, but it is not working…

this is my table…

 <form id="form1" name="form1" method="post" action="">
  <table width="427" border="1" align="center">
    <tr bordercolor="#000000" bgcolor="#0000FF">
      <td width="26" class="style6">&nbsp;</td>
      <td width="31" class="style6"><div align="center" class="style7">Bil</div></td>
      <td width="147" class="style6"><div align="center" class="style7">Name</div></td>
      <td width="96" class="style6"><div align="center" class="style12">Matrik Num </div></td>
      <td width="93" class="style6"><div align="center" class="style12">Category</div></td>
    </tr>
    <?php  

$room = $_POST['room'];

$sql = "SELECT * from info
		WHERE room = '$room' ";
		
		
$result = mysql_query($sql) or die ("There's an error running on '$result'" .mysql_error());
$rows = mysql_fetch_array($result);
$totalRows= mysql_num_rows($result);

$i=$record; do
{
?>
    <tr class="style16">
      <td class="style16"><label>
        <div align="center">
          <input name="checkbox[]" type="checkbox" id="checkbox[]" value="<?php echo $rows['matric']?>" />
</div>
      </label></td>
      <td class="style16"><div align="center"><span class="style16"><?php echo $i++?></span></div></td>
      <td class="style16"><div align="center" class="style16">
        <div align="left"><?php echo $rows['name']; ?> </div>
      </div></td>
      <td class="style16"><div align="center" class="style16"><?php echo $rows['matric']; ?> </div></td>
      <td class="style16"><div align="center" class="style16"><?php echo $rows['unit']; ?> </div></td>
    </tr>
    <?php
}
while($rows = mysql_fetch_array($result));

?>
  </table>
  <div align="center">
  <p align="center" class="style1">
    <label>
    <input name="Submit" type="submit" class="style16" id="Submit" value="Check Out" />
</label>
    <label></label> 
    <span class="style1">

    </span></p>
</form> 

this is the code…

 <?php
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "") 
{
  $theValue = (!get_magic_quotes_gpc()) ? addslashes($theValue) : $theValue;

  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? "'" . doubleval($theValue) . "'" : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}

$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
  $editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
}

if ((isset($_POST['Submit'])) && ($_POST['Submit'] == "Check Out")) 
{
$matric = $_POST['matric'];

  $deleteSQL = sprintf("DELETE FROM info WHERE matric= '". $_POST['checkbox'] ."'",
                       GetSQLValueString($_POST['matric'], "text"));

  mysql_select_db($database_sistem_maklumat_pelajar, $sistem_maklumat_pelajar);
  $Result1 = mysql_query($deleteSQL, $sistem_maklumat_pelajar) or die(mysql_error());

$deleteGoTo = "checkoutsuccess.php";
  if (isset($_SERVER['QUERY_STRING'])) 
  {
    $deleteGoTo .= (strpos($deleteGoTo, '?')) ? "&" : "?";
    $deleteGoTo .= $_SERVER['QUERY_STRING'];
  }
  header(sprintf("Location: %s", $deleteGoTo));
}

its okie… i’ve already got the solution… by the way just in case if anybody got a problem as me… this is the solution that i got…

 $editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
  $editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
}

if (isset($_POST['checkbox']))
{
  $deleteList =implode (",", $_POST['checkbox']);
   mysql_select_db($database_sistem_maklumat_pelajar, $sistem_maklumat_pelajar);
 }
 $sql = "DELETE FROM info WHERE matric in ($deleteList)";
 $Result1 = mysql_query($sql, $sistem_maklumat_pelajar) or die(mysql_error());

$deleteGoTo = "checkoutsuccess.php";
  if (isset($_SERVER['QUERY_STRING'])) 
  {
    $deleteGoTo .= (strpos($deleteGoTo, '?')) ? "&" : "?";
    $deleteGoTo .= $_SERVER['QUERY_STRING'];
  }
  header(sprintf("Location: %s", $deleteGoTo));
}