function submitForm() {
    new ajax ('/send.php', 
        {
        	postBody: 'submit=true&name=' + $('name').value + '&email=' + $('email').value + '&message=' + $('message').value + '&c=' + $('c').value,
        	update: $('thanksContact'), 
        	onComplete: formSubmitted
        }
    );
}

function formSubmitted(request) {
    if (request.responseText.charAt(0) == 'T') {
        $('thanksContact').className = 'response ok';
    } else {
        $('thanksContact').className = 'response problem';
    }
}