mail_submit_status = false;
function mail_submit(form_selector) {
 
	if (!mail_submit_status) {
		mail_submit_status = true;
		var form = $(form_selector);
		var fields = {
			address: form.find('input[name=address]').val(),
                        program: form.find('input[name=program]').val()
		};
		if(form.find('.is-loading').html()==''){

                }else{
                    form.append('<div class="is-loading"></div>');
                }
		form.find('.is-loading').fadeIn();
		$.ajax({
			type:		'POST',
			data:		fields,
			dataType:	'json',
			url:		'/visitors/mail.php',
			success: function (result) {
				form.find('.is-loading').fadeOut();
				mail_submit_status = false;
				var status = result[0];
				if (status) {
					message_success = 'Email has been recorded';
					form_success_div = form.find('.is-success');
					if (form_success_div.length == 0) {
						alert(message_success);
					} else {
						form_success_div.fadeIn();
						form_success_div.find('.result').html(message_success);
					}
				} else {
					alert('Error with Email address');
				}
			},
			error: function() {
				form.find('.is-loading').fadeOut();
				alert('Error with Email address');
				mail_submit_status = false;
			}
		});
	}
	return false;
}