Gemme form data vha. jQuery AJAX

Jeg er ny i jQuery, og javascript generelt, men har "snuset" lidt til det.

Jeg vil gerne lave form validering og lave et ajax kald, til den side hvor jeg gemmer dataene i mysql, med jQuery.

Men jeg går i stå her. Kan ikke finde svar på hvorfor den ikke gemme noget?

Valideringen vil jeg lave når jeg kan gemme data.



Dette er process.php

 <?php
     include('functions.php');
     
     if ($_GET['DO'] == "INSERT") {
         
         $data = array_map("check_input_mysql_injection", $_POST);
         
         sql_execute ("INSERT", "structure_options", $data, $where);
         
     } elseif ($_GET['DO'] == "UPDATE") {
         
         $data = array_map("check_input_mysql_injection", $_POST);
         
         $where = "id = '1''";
         
         sql_execute ("UPDATE", "structure_options", $data, $where);
         
         echo json_encode(array("success" => "Det lykkedes!", "error" => "Fejl!"));
         
     } elseif ($_GET['DO'] == "DELETE") {
         
         $where = "id = '1''";
         
         $data = array_map("check_input_mysql_injection", $_POST);
         
         sql_execute ("DELETE", "structure_options", $data, $where);
         
     }
     
 ?>

Dette er siden med min form.

 <?php
     include("inc/functions.php");
     
     $options_result = sql_execute ("SELECT", "structure_options", "", "");
     
     $options_row = mysql_fetch_array($options_result);
 ?>
 
 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
 
 <script type="text/javascript">
     $(document).ready(function() {
         
         //if submit button is clicked
         $('#submit1').click(function () { 
             
             var_form_data = $(this).serialize();
             
             $.ajax({
                 
                 //POST method is used
                 type: "POST",
                 
                 //this is the php file that processes the data
                 url: "inc/process.php?DO=UPDATE",
                 
                 dataType: "json",
                 
                 //pass the data 
                 data: var_form_data,
                 
                 //Do not cache the page
                 cache: false,
                 
             });
         
         })
         
         return false;
         
     });
 </script>
 
 
 
 
 <form id="form1" method="post">
 
     <table border="1" width="100%">
         <tr>
             <td>Titel</td>
             <td><input type="text" size="34" name="site_title" value="<?php echo $options_row["site_title"]; ?>" /></td>
         </tr>
         <tr>
             <td>Overskrift</td>
             <td><input type="text" size="34" name="site_header" value="<?php echo $options_row["site_header"]; ?>" /></td>
         </tr>
         <tr>
             <td>URL</td>
             <td><input type="text" size="34" name="site_url" value="<?php echo $options_row["site_url"]; ?>" /></td>
         </tr>
     </table>
     
     <input id="submit1" type="submit" value="Gem" />
     
 </form>
 
 <form id="form2" method="post">
     
     <table border="1" width="100%">
         <tr>
             <td>Beskrivelse</td>
             <td><input type="text" size="34" name="meta_description" value="<?php echo $options_row["description"]; ?>" /></td>
         </tr>
         <tr>
             <td>Keywords</td>
             <td><input type="text" size="34" name="meta_keywords" value="<?php echo $options_row["keywords"]; ?>" /></td>
         </tr>
         <tr>
             <td>Ejer</td>
             <td><input type="text" size="34" name="meta_author" value="<?php echo $options_row["owner"]; ?>" /></td>
         </tr>
     </table>
     
     <input id="submit2" type="submit" value="Gem" />
     
 </form>

Her ligger scriptet