jQuery(document).ready(function() {
	// Handle subscribe form.
	jQuery("#subscribe-button").click(function(event){
		event.preventDefault();
		subscribe();
    });
	jQuery("#address").keypress(function(event){
		if (event.which == 13) {
			event.preventDefault();
			subscribe();
		}
    });
});

function subscribe() {
	var address = trim(jQuery("#address").val());
	if (!validateEmail(address)) {
		alert("Please enter a valid email address!");
		jQuery("#address").focus();
		return;
	}
	jQuery("#subscribe-button").attr('disabled', 'disabled');
	jQuery("#spinner-div").show();
	jQuery.post("http://www.cerience.com/wp-content/plugins/cerience/subscribe.php", { email: address }, function(response){
		jQuery("#spinner-div").hide();
		jQuery("#subscribe-button").removeAttr('disabled');
		if (response == "success") {
			jQuery("#subscribe-note").html("<br />Thank you for subscribing!");
		} else {
			jQuery("#subscribe-note").html("An error occurred. Please try again.");
		}
	});
}

function trim(str) {
	return str.replace(/^\s+|\s+$/g,"");
}

function validateEmail(email) {
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	return reg.test(email);
}