I have two rows of check-boxes. When a user clicks on any individual check-box (in a certain row) I want to add a number to my sum in PHP. If he deselects an individual check-box I want to subtract from the total in real time without page refresh. **My question what goes in the data field on my AJAX call?**

***and is this the correct way to do it ?***

HTML
----

```
<input type="checkbox" name="standard_form[]" value="A" onclick="processForm()">
<input type="checkbox" name="premium_form[]" value="B" onclick="processForm()">

```

JQUERY
------

```
<script type="text/javascript">
function processForm() { 
        $.ajax( {
            type: 'POST',
            url: 'submit_form.php',
            data: '',

            success: function(data) {
                $('#message').html(data);
            }
        } );
}
</script>

```

PHP
---

```
    if(IsChecked('standard_form','A'))
    {
      $price += IsChecked('standard_form','A') ? 10 : 0;
    }
   return $price ; 

```

---