// Attach handler to window load event
Event.observe(window, 'load', init, false);

function init() {
	// Attach handler to form's submit event
	Event.observe('addressForm', 'submit', storeAddress);
}

function storeAddress(e) {
	// Update user interface
	$('response').innerHTML = 'Adding email address...';
	// Prepare query string and send AJAX request
	var pars = 'address=' + escape($F('address'));
	var myAjax = new Ajax.Updater('response', 'ajaxServer.php', {method: 'get', parameters: pars});
	// Stop form from submitting when JavaScript is enabled
	Event.stop(e);
}