**index.php** has several fields, one of which is a dropdown named **item\_A**. If a user selects a certain value in **item\_A**, AJAX will cause a checkbox that is checked to appear on the form in **index.php**. The name of the checkbox is **check\_A**.

However, when reading the values from the POST of **index.php**, the value from the checkbox is not present. How can I get the value of such a checkbox?

Here's the AJAX code between the HEAD tags of **index.php**:

```
<script type="text/javascript">
$(document).ready(function() {
    $('#item_A').blur(function(){
       $.post("process_A.php", {
        bookid: $('#bookid').val()
      }, function(response){
        $('#usernameResult').fadeOut();
        setTimeout("finishAjax('usernameResult', '"+escape(response)+"')", 400);
      });
        return false;
    });
});

```

Here's the line from **process\_A.php** which reveals the checkbox on **index.php**:

```
echo "<input type=\"checkbox\" name=\"check_A\" checked> I would like Option A.";

```

And here's the area from **index.php**, between the FORM tags, where the checkbox appears:

```
<span id="usernameResult" style="color:green;"></span>

```