jQuery AJAX submit plugin

plugin.ajax_submit.js

// Submit a form via AJAX and return the request object
$.fn.ajaxSubmit = function (options) {
	var settings = $.extend({
		submittingText: 'Submitting...'
	}, options);
	var form = $(this);
	var url = form.attr('action');
	var data = form.serialize();
	var type = form.attr('method');
	var submitButton = form.find('[type="submit"]');
	var originalSubmitButtonText = submitButton.text();
	var request = $.ajax({
		data: data,
		dataType: 'json',
		type: type,
		url: url
	});
	submitButton.prop('disabled', true).text(settings.submittingText);
	request.always(function () {
		submitButton.prop('disabled', false);
		submitButton.text(originalSubmitButtonText);
	});
	return request;
}

usage.js

var request = $('form').ajaxSubmit({
	submittingText: 'Adding Record...'
});

request.done(function (response) {
	// POST was successful
});

request.fail(function (jqXHR, textStatus, errorThrown) {
	// POST failed
	// JSON can be found in jqXHR.responseJSON
});