AJAX Form w/ PHP response

form.js

$('#main-form').submit(function(e) {

			e.preventDefault();

			var name = $('#main-form #name-input').val();
			var email = $('#main-form #email-input').val();
			var formData = {};
			var alertElement = $('#main-form .alert');

			alertElement.removeClass('alert-success alert-danger');

			var alertClass = '';
			var alertText = '';
			var showAlert = function(alertClass, alertText) {
				alertElement
				.addClass(alertClass)
				.text(alertText)
				.show();
			};

			// super basic validation
			if((name && email) !== '') {
				formData.name = name;
				formData.email = email;
				formData.website = window.location.pathname;

				$.ajax({
					type: 'POST',
					url: 'process.php',
					data: formData,
					success: function(data) {
						var response = JSON.parse(data);
						if(response.failure){
							alertClass = 'alert-danger';

							if(response.failure) {
								alertText += response.failure;
							}
							if(response.name) {
								alertText += ' '+response.name;
							}
							if(response.email) {
								alertText += ' '+response.email;
							}

						} else if(response.success) {
							alertClass = 'alert-success';
							alertText = response.success;
						}

						showAlert(alertClass, alertText);
					},
					error: function() {
						showAlert('alert-danger', 'Sorry. Something went wrong. Your message was not received.');
					}
				});

				var timer = setTimeout(function() {
					clearTimeout(timer);
					alertElement
					.removeClass('alert-success alert-danger')
					.text('')
					.hide();
				}, 10000);

				return false;
			}
		});

process.php

<?php
if( isset($_POST) ) {
	$recipient = "";
	$subject = "I registered for an exclusive preview";

	//form data
	$name = strip_tags($_POST["name"]);
	$email = strip_tags($_POST["email"]);
	$website = strip_tags($_POST["website"]);

	$response = array();

	$valid = true;

	//basic validation
	if($name == "") {
		$response["name"] = "Please enter a name";
		$valid = false;
	}
	if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
		$response["email"] = "Invalid email address";
		$valid = false;
	}

	if($valid == true) {
		//send email
		$headers = "From: {$website} form submission" . "\r\n";
		$headers .= "Content-type: text/html; charset=iso-8859-1" . "\r\n";

		$emailbody = 	"<p><strong>Name: </strong> {$name} </p>";
		$emailbody .= 	"<p><strong>Email Address: </strong> {$email} </p>";

		mail($recipient,$subject,$emailbody,$headers);

		$response["success"] = "Your message has been received. Thank you.";
		// $response[] = "success" => "Your message has been received. Thank you.";
	} elseif($valid == false) {

		//deliver error message
		$response["failure"] = "Your information is invalid.";
		// $response[] = "failure" => "Your information is invalid.";
	}

	echo json_encode($response);
}
?>