AJax FAPI

Hi Drupallers

I need assistance with the following I have a form:

function the_form() {
$form['name'] = array(
'#type' => 'textfield',
'#title' => t('Name'),
);

$form['surname'] = array(
'#type' => 'textfield',
'#title' => t('Name'),
);

$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Submit'),
);
return $form;
}

Firstly how would I go about setting adding the following to the form element onsubmit="sendData( )" return false

Secondly How would one go about getting the values of the text field and return a status message with ajax!