function submit_form(form) {
	
	$.post(form.action,$(form).serialize(), function() {
		alert('Thank you!');
		clear_form(form);
	});

	return false;
}

function clear_form(form) {
	for (var i=0; i<form.elements.length; i++) {
		switch (form.elements[i].type) {
			case 'text':
			case 'textarea':
				form.elements[i].value = '';
			break;
		}
	}
}