PHP, MySQL, Ajax Call

I am not a jquery guru in any sense, so I am seeking some help with the below code. What I am trying to do, is populate two input fields, based on what is selected from a dropdown field via a database call.

When I select a term from the dropdown, I want the term start date and term end date to populate in the appropriate fields. First here is my form:

    <form class="form-horizontal margin-none" action="<?=BASE_URL;?>form/runSection/" id="validateSubmitForm" method="post" autocomplete="off">
    <div class="control-group">
    <label class="control-label"><font color="red">*</font> <?php _e( _t( 'Term' ) ); ?></label>
    <div class="controls">
    <select style="width:100%;" name="termCode" id="select2_10" required>
    <option value=""> </option>
    <?php table_dropdown('term', 'termCode', 'termName'); ?>
    </select>
    </div>
    </div>
    <div class="control-group">
    <label class="control-label"><?php _e( _t( 'Term Start/End' ) ); ?></label>
    <div class="controls">
    <input type="text" name="termStartDate" id="termStartDate" disabled class="span6" required />
    <input type="text" name="termEndDate" id="termEndDate" disabled class="span6" required />
    </div>
    </div>

Second here is the javascript section:

    <script type="text/javascript">
    jQuery(document).ready(function(){
    jQuery('#select2_10').live('change', function(event) {
    $.ajax({
    type : 'POST',
    url : '<?=BASE_URL;?>section/runTermLookup/',
    dataType: 'json',
    data : $('#validateSubmitForm').serialize(),
    cache: false,
    success: function( data ) {
    for(var id in data) {
    $(id).val( data[id] );
    }
    }
    });
    });
    });
    </script>

Third, here is the method from my controller which passes the $_POST['termCode'] to the method of the same name found in the model:

    public function runTermLookup() {
    if(!$this->_auth->isUserLoggedIn()) { redirect( BASE_URL ); }
    $data = array();
    $data['termCode'] = isPostSet('termCode');
    $this->model->runTermLookup($data);
    }

Lastly, here is the method from my model:

    public function runTermLookup($data) {
    $bind = array(":term" => $data['termCode']);
    $q = DB::inst()->select( "term","termCode = :term","termID","termStartDate,termEndDate", $bind );
    $r = $q->fetch(\PDO::FETCH_ASSOC);
    $json = array( 'input#termStartDate' => $r['termStartDate'], 'input#termEndDate' => $r['termEndDate'] );
    echo json_encode($json);
    }

I've been looking at this for hours, so a fresh pair of eyes is greatly appreciated. Thank you.