Hi all, I have a form which is for the user to update their details. When they press 'Update', this does indeed update the database and page refreshes but refreshes with still the old data. I need to refresh *again* for it to show the latest updated record. Any ideas as to what I can do to conquer this?

PHP Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<?php
require('auth.php');
require(
'includes/head.php');
?>
<body>
<?php
include('includes/header.php');
require(
'includes/connection.php');
    
$url $_GET['id'];
        
$query mysql_query("SELECT * FROM customers WHERE customer_ref='$url'");
            
$res mysql_fetch_array($query);
                if (isset(
$_POST['update'])) {
                    
$update mysql_query("UPDATE customers SET c_dob='$_POST[cdob]' WHERE customer_ref='$url'");
                    }
?>
<div id="wrap">
<div id="mainWrap">
<form action="<?=$_SERVER['PHP_SELF'].'?id='.$url?>" method="post" id="createorder">
<div class="headerTitles">Edit Customer Details</div>
<!-- BOF Left Col -->
<div id="leftCol">
<span class="fontField bold">Title </span>
<select class="textField" <?=$disabled?>  name="title">
  <option value="NULL">Choose a Title</option>
  <option value="Mr" <?php if ($res['c_title']=="Mr"){ echo "selected=\"selected\"";} ?>>Mr</option>
  <option value="Mrs" <?php if ($res['c_title']=="Mrs"){ echo "selected=\"selected\"";} ?>>Mrs</option>
  <option value="Miss" <?php if ($res['c_title']=="Miss"){ echo "selected=\"selected\"";} ?>>Miss</option>
  <option value="Ms" <?php if ($res['c_title']=="Ms"){ echo "selected=\"selected\"";} ?>>Ms</option>
  <option value="Dr" <?php if ($res['c_title']=="Dr"){ echo "selected=\"selected\"";} ?>>Dr.</option>
  <option value="Rev" <?php if ($res['c_title']=="Rev"){ echo "selected=\"selected\"";} ?>>Rev</option>
</select>
<span class="fontField bold lower">First Name </span>
<input type="text" name="cfirstname" <?=$disabled?> value="<?php echo $res['c_firstname'?>" class="<?php if(isset($alert[1])){echo $alert[1];} else {echo "textField";} ?>" />

<span class="fontField bold lower">Last Name </span>
<input type="text" name="clastname" <?=$disabled?> value="<?php echo $res['c_lastname'?>" class="<?php if(isset($alert[2])){echo $alert[2];} else {echo "textField";} ?>" />

<span class="fontField bold lower">Address </span>
<textarea name="caddress" <?=$disabled?> rows="6" cols="0" class="<?php if(isset($alert[3])){echo $alert[3];} else {echo "textField";} ?>"><?php echo $res['c_address'?></textarea>

<span class="fontField bold lower">Contact Number</span>
<input type="text" <?=$disabled?> name="ccontactnumber" value="<?php echo $res['c_number'?>" class="textField" />

<span class="fontField bold lower">Email Address</span>
<input type="text" <?=$disabled?> name="cemail" value="<?php echo $res['c_email'?>" class="textField" />
</div>
<!-- EOF Left Col -->

<!-- BOF Right Col -->
<div id="rightCol">
<span class="fontField bold">Registration Date</span>
<input type="text" name="cname" value="<?php echo $res['c_regdate'?>" class="textField" disabled="disabled" />

<span class="fontField bold lower">Customer ID Number</span>
<input type="text" name="custnotes" value="<?php echo $res['customer_ref'?>" class="textField" disabled="disabled" />

<span class="fontField bold lower">Customer Notes</span>
<textarea name="cnotes" <?=$disabled?> class="textField" rows="6" cols="0"><?php echo $res['c_notes'?></textarea>

<span class="fontField bold lower">Date of Birth</span>
<input type="text" name="cdob" <?=$disabled?> value="<?=$res['c_dob']?>" class="textField" />
</div>
<div class="headerTitles"><input type="submit" value="Update" name="update" id="update" /></div>
</form>
</body>
</html>