(function (factory) {
	if (typeof define === 'function' && define.amd) {
		define(['internal_handlers'], factory);
	} else if (typeof module === 'object' && module.exports) {
		module.exports = function( root, internalObj ) {
			if (typeof internalObj === 'undefined') {
				if (typeof window !== 'undefined') {
					internalObj = require('internalObj');
				}
				else {
					internalObj = require('internalObj')(root);
				}
			}
			factory(internalObj);
			return internalObj;
		};
	}
}(function ($) {
	var rCRLF = /\r?\n/g;

	/**
	 * Feature detection
	 */
	var feature = {};

	feature.fileapi = $('<input type="file">').get(0).files !== undefined;
	feature.formdata = (typeof window.FormData !== 'undefined');

	var hasProp = !!$.fn.prop;

	// attr2 uses prop when it can but checks the return type for
	// an expected string. This accounts for the case where a form
	// contains inputs with names like "action" or "method"; in those
	// cases "prop" returns the element
	$.fn.attr2 = function() {
		if (!hasProp) {
			return this.attr.apply(this, arguments);
		}

		var val = this.prop.apply(this, arguments);

		if ((val && val.internalObj) || typeof val === 'string') {
			return val;
		}

		return this.attr.apply(this, arguments);
	};

	/**
	 * ajaxSubmit() provides a mechanism for immediately submitting
	 * an HTML form using AJAX.
	 *
	 * @param	{object|string}	options		jquery.form.js parameters or custom url for submission
	 * @param	{object}		data		extraData
	 * @param	{string}		dataType	ajax dataType
	 * @param	{function}		onSuccess	ajax success callback function
	 */
	$.fn.ajaxSubmit = function(options, data, dataType, onSuccess) {
		// fast fail if nothing selected (http://dev.jquery.com/ticket/2752)
		if (!this.length) {
			log('ajaxSubmit: skipping submit process - no element selected');

			return this;
		}

		/* eslint consistent-this: ["error", "$form"] */
		var method, action, url, isMsie, iframeSrc, $form = this;

		if (typeof options === 'function') {
			options = {success: options};

		} else if (typeof options === 'string' || (options === false && arguments.length > 0)) {
			options = {
				'url'      : options,
				'data'     : data,
				'dataType' : dataType
			};

			if (typeof onSuccess === 'function') {
				options.success = onSuccess;
			}

		} else if (typeof options === 'undefined') {
			options = {};
		}

		method = options.method || options.type || this.attr2('method');
		action = options.url || this.attr2('action');

		url = (typeof action === 'string') ? $.trim(action) : '';
		url = url || window.location.href || '';
		if (url) {
			// clean url (don't include hash vaue)
			url = (url.match(/^([^#]+)/) || [])[1];
		}
		// IE requires javascript:false in https, but this breaks chrome >83 and goes against spec.
		// Instead of using javascript:false always, let's only apply it for IE.
		isMsie = /(MSIE|Trident)/.test(navigator.userAgent || '');
		iframeSrc = (isMsie && /^https/i.test(window.location.href || '')) ? 'javascript:false' : 'about:blank'; // eslint-disable-line no-script-url

		options = $.extend(true, {
			url       : url,
			success   : $.ajaxSettings.success,
			type      : method || $.ajaxSettings.type,
			iframeSrc : iframeSrc
		}, options);

		// hook for manipulating the form data before it is extracted;
		// convenient for use with rich editors like tinyMCE or FCKEditor
		var veto = {};

		this.trigger('form-pre-serialize', [this, options, veto]);

		if (veto.veto) {
			log('ajaxSubmit: submit vetoed via form-pre-serialize trigger');

			return this;
		}

		// provide opportunity to alter form data before it is serialized
		if (options.beforeSerialize && options.beforeSerialize(this, options) === false) {
			log('ajaxSubmit: submit aborted via beforeSerialize callback');

			return this;
		}

		var traditional = options.traditional;

		if (typeof traditional === 'undefined') {
			traditional = $.ajaxSettings.traditional;
		}

		var elements = [];
		var qx, a = this.formToArray(options.semantic, elements, options.filtering);

		if (options.data) {
			var optionsData = $.isFunction(options.data) ? options.data(a) : options.data;

			options.extraData = optionsData;
			qx = $.param(optionsData, traditional);
		}

		// give pre-submit callback an opportunity to abort the submit
		if (options.beforeSubmit && options.beforeSubmit(a, this, options) === false) {
			log('ajaxSubmit: submit aborted via beforeSubmit callback');

			return this;
		}

		// fire vetoable 'validate' event
		this.trigger('form-submit-validate', [a, this, options, veto]);
		if (veto.veto) {
			log('ajaxSubmit: submit vetoed via form-submit-validate trigger');

			return this;
		}

		var q = $.param(a, traditional);

		if (qx) {
			q = (q ? (q + '&' + qx) : qx);
		}

		if (options.type.toUpperCase() === 'GET') {
			options.url += (options.url.indexOf('?') >= 0 ? '&' : '?') + q;
			options.data = null;	// data is null for 'get'
		} else {
			options.data = q;		// data is the query string for 'post'
		}

		var callbacks = [];

		if (options.resetForm) {
			callbacks.push(function() {
				$form.resetForm();
			});
		}

		if (options.clearForm) {
			callbacks.push(function() {
				$form.clearForm(options.includeHidden);
			});
		}

		// perform a load on the target only if dataType is not provided
		if (!options.dataType && options.target) {
			var oldSuccess = options.success || function(){};

			callbacks.push(function(data, textStatus, jqXHR) {
				var successArguments = arguments,
					fn = options.replaceTarget ? 'replaceWith' : 'html';

				$(options.target)[fn](data).each(function(){
					oldSuccess.apply(this, successArguments);
				});
			});

		} else if (options.success) {
			if ($.isArray(options.success)) {
				$.merge(callbacks, options.success);
			} else {
				callbacks.push(options.success);
			}
		}

		options.success = function(data, status, xhr) { // jQuery 1.4+ passes xhr as 3rd arg
			var context = options.context || this;		// jQuery 1.4+ supports scope context

			for (var i = 0, max = callbacks.length; i < max; i++) {
				callbacks[i].apply(context, [data, status, xhr || $form, $form]);
			}
		};

		if (options.error) {
			var oldError = options.error;

			options.error = function(xhr, status, error) {
				var context = options.context || this;

				oldError.apply(context, [xhr, status, error, $form]);
			};
		}

		if (options.complete) {
			var oldComplete = options.complete;

			options.complete = function(xhr, status) {
				var context = options.context || this;

				oldComplete.apply(context, [xhr, status, $form]);
			};
		}

		// are there files to upload?

		// [value] (issue #113), also see comment:
		// https://github.com/malsup/form/commit/588306aedba1de01388032d5f42a60159eea9228#commitcomment-2180219
		var fileInputs = $('input[type=file]:enabled', this).filter(function() {
			return $(this).val() !== '';
		});
		var hasFileInputs = fileInputs.length > 0;
		var mp = 'multipart/form-data';
		var multipart = ($form.attr('enctype') === mp || $form.attr('encoding') === mp);
		var fileAPI = feature.fileapi && feature.formdata;

		log('fileAPI :' + fileAPI);

		var shouldUseFrame = (hasFileInputs || multipart) && !fileAPI;
		var jqxhr;

		// options.iframe allows user to force iframe mode
		// 06-NOV-09: now defaulting to iframe mode if file input is detected
		if (options.iframe !== false && (options.iframe || shouldUseFrame)) {
			// hack to fix Safari hang (thanks to Tim Molendijk for this)
			// see: http://groups.google.com/group/jquery-dev/browse_thread/thread/36395b7ab510dd5d
			if (options.closeKeepAlive) {
				$.get(options.closeKeepAlive, function() {
					jqxhr = fileUploadIframe(a);
				});

			} else {
				jqxhr = fileUploadIframe(a);
			}

		} else if ((hasFileInputs || multipart) && fileAPI) {
			jqxhr = fileUploadXhr(a);

		} else {
			jqxhr = $.ajax(options);
		}

		$form.removeData('jqxhr').data('jqxhr', jqxhr);

		// clear element array
		for (var k = 0; k < elements.length; k++) {
			elements[k] = null;
		}

		// fire 'notify' event
		this.trigger('form-submit-notify', [this, options]);

		return this;

		// utility fn for deep serialization
		function deepSerialize(extraData) {
			var serialized = $.param(extraData, options.traditional).split('&');
			var len = serialized.length;
			var result = [];
			var i, part;

			for (i = 0; i < len; i++) {
				// #252; undo param space replacement
				serialized[i] = serialized[i].replace(/\+/g, ' ');
				part = serialized[i].split('=');
				// #278; use array instead of object storage, favoring array serializations
				result.push([decodeURIComponent(part[0]), decodeURIComponent(part[1])]);
			}

			return result;
		}

		// XMLHttpRequest Level 2 file uploads (big hat tip to francois2metz)
		function fileUploadXhr(a) {
			var formdata = new FormData();

			for (var i = 0; i < a.length; i++) {
				formdata.append(a[i].name, a[i].value);
			}

			if (options.extraData) {
				var serializedData = deepSerialize(options.extraData);

				for (i = 0; i < serializedData.length; i++) {
					if (serializedData[i]) {
						formdata.append(serializedData[i][0], serializedData[i][1]);
					}
				}
			}

			options.data = null;

			var s = $.extend(true, {}, $.ajaxSettings, options, {
				contentType : false,
				processData : false,
				cache       : false,
				type        : method || 'POST'
			});

			if (options.uploadProgress) {
				// workaround because jqXHR does not expose upload property
				s.xhr = function() {
					var xhr = $.ajaxSettings.xhr();

					if (xhr.upload) {
						xhr.upload.addEventListener('progress', function(event) {
							var percent = 0;
							var position = event.loaded || event.position;			/* event.position is deprecated */
							var total = event.total;

							if (event.lengthComputable) {
								percent = Math.ceil(position / total * 100);
							}

							options.uploadProgress(event, position, total, percent);
						}, false);
					}

					return xhr;
				};
			}

			s.data = null;

			var beforeSend = s.beforeSend;

			s.beforeSend = function(xhr, o) {
				// Send FormData() provided by user
				if (options.formData) {
					o.data = options.formData;
				} else {
					o.data = formdata;
				}

				if (beforeSend) {
					beforeSend.call(this, xhr, o);
				}
			};

			return $.ajax(s);
		}

		// private function for handling file uploads (hat tip to YAHOO!)
		function fileUploadIframe(a) {
			var form = $form[0], el, i, s, g, id, $io, io, xhr, sub, n, timedOut, timeoutHandle;
			var deferred = $.Deferred();

			// #341
			deferred.abort = function(status) {
				xhr.abort(status);
			};

			if (a) {
				// ensure that every serialized input is still enabled
				for (i = 0; i < elements.length; i++) {
					el = $(elements[i]);
					if (hasProp) {
						el.prop('disabled', false);
					} else {
						el.removeAttr('disabled');
					}
				}
			}

			s = $.extend(true, {}, $.ajaxSettings, options);
			s.context = s.context || s;
			id = 'jqFormIO' + new Date().getTime();
			var ownerDocument = form.ownerDocument;
			var $body = $form.closest('body');

			if (s.iframeTarget) {
				$io = $(s.iframeTarget, ownerDocument);
				n = $io.attr2('name');
				if (!n) {
					$io.attr2('name', id);
				} else {
					id = n;
				}

			} else {
				$io = $('<iframe name="' + id + '" src="' + s.iframeSrc + '" />', ownerDocument);
				$io.css({position: 'absolute', top: '-1000px', left: '-1000px'});
			}
			io = $io[0];


			xhr = { // mock object
				aborted               : 0,
				responseText          : null,
				responseXML           : null,
				status                : 0,
				statusText            : 'n/a',
				getAllResponseHeaders : function() {},
				getResponseHeader     : function() {},
				setRequestHeader      : function() {},
				abort                 : function(status) {
					var e = (status === 'timeout' ? 'timeout' : 'aborted');

					log('aborting upload... ' + e);
					this.aborted = 1;

					try { // #214, #257
						if (io.contentWindow.document.execCommand) {
							io.contentWindow.document.execCommand('Stop');
						}
					} catch (ignore) {}

					$io.attr('src', s.iframeSrc); // abort op in progress
					xhr.error = e;
					if (s.error) {
						s.error.call(s.context, xhr, e, status);
					}

					if (g) {
						$.event.trigger('ajaxError', [xhr, s, e]);
					}

					if (s.complete) {
						s.complete.call(s.context, xhr, e);
					}
				}
			};

			g = s.global;
			// trigger ajax global events so that activity/block indicators work like normal
			if (g && $.active++ === 0) {
				$.event.trigger('ajaxStart');
			}
			if (g) {
				$.event.trigger('ajaxSend', [xhr, s]);
			}

			if (s.beforeSend && s.beforeSend.call(s.context, xhr, s) === false) {
				if (s.global) {
					$.active--;
				}
				deferred.reject();

				return deferred;
			}

			if (xhr.aborted) {
				deferred.reject();

				return deferred;
			}

			// add submitting element to data if we know it
			sub = form.clk;
			if (sub) {
				n = sub.name;
				if (n && !sub.disabled) {
					s.extraData = s.extraData || {};
					s.extraData[n] = sub.value;
					if (sub.type === 'image') {
						s.extraData[n + '.x'] = form.clk_x;
						s.extraData[n + '.y'] = form.clk_y;
					}
				}
			}

			var CLIENT_TIMEOUT_ABORT = 1;
			var SERVER_ABORT = 2;

			function getDoc(frame) {
				/* it looks like contentWindow or contentDocument do not
				 * carry the protocol property in ie8, when running under ssl
				 * frame.document is the only valid response document, since
				 * the protocol is know but not on the other two objects. strange?
				 * "Same origin policy" http://en.wikipedia.org/wiki/Same_origin_policy
				 */

				var doc = null;

				// IE8 cascading access check
				try {
					if (frame.contentWindow) {
						doc = frame.contentWindow.document;
					}
				} catch (err) {
					// IE8 access denied under ssl & missing protocol
					log('cannot get iframe.contentWindow document: ' + err);
				}

				if (doc) { // successful getting content
					return doc;
				}

				try { // simply checking may throw in ie8 under ssl or mismatched protocol
					doc = frame.contentDocument ? frame.contentDocument : frame.document;
				} catch (err) {
					// last attempt
					log('cannot get iframe.contentDocument: ' + err);
					doc = frame.document;
				}

				return doc;
			}

			// Rails CSRF hack (thanks to Yvan Barthelemy)
			var csrf_token = $('meta[name=csrf-token]').attr('content');
			var csrf_param = $('meta[name=csrf-param]').attr('content');

			if (csrf_param && csrf_token) {
				s.extraData = s.extraData || {};
				s.extraData[csrf_param] = csrf_token;
			}

			// take a breath so that pending repaints get some cpu time before the upload starts
			function doSubmit() {
				// make sure form attrs are set
				var t = $form.attr2('target'),
					a = $form.attr2('action'),
					mp = 'multipart/form-data',
					et = $form.attr('enctype') || $form.attr('encoding') || mp;

				// update form attrs in IE friendly way
				form.setAttribute('target', id);
				if (!method || /post/i.test(method)) {
					form.setAttribute('method', 'POST');
				}
				if (a !== s.url) {
					form.setAttribute('action', s.url);
				}

				// ie borks in some cases when setting encoding
				if (!s.skipEncodingOverride && (!method || /post/i.test(method))) {
					$form.attr({
						encoding : 'multipart/form-data',
						enctype  : 'multipart/form-data'
					});
				}

				// support timout
				if (s.timeout) {
					timeoutHandle = setTimeout(function() {
						timedOut = true; cb(CLIENT_TIMEOUT_ABORT);
					}, s.timeout);
				}

				// look for server aborts
				function checkState() {
					try {
						var state = getDoc(io).readyState;

						log('state = ' + state);
						if (state && state.toLowerCase() === 'uninitialized') {
							setTimeout(checkState, 50);
						}

					} catch (e) {
						log('Server abort: ', e, ' (', e.name, ')');
						cb(SERVER_ABORT);				// eslint-disable-line callback-return
						if (timeoutHandle) {
							clearTimeout(timeoutHandle);
						}
						timeoutHandle = undefined;
					}
				}

				// add "extra" data to form if provided in options
				var extraInputs = [];

				try {
					if (s.extraData) {
						for (var n in s.extraData) {
							if (s.extraData.hasOwnProperty(n)) {
								// if using the $.param format that allows for multiple values with the same name
								if ($.isPlainObject(s.extraData[n]) && s.extraData[n].hasOwnProperty('name') && s.extraData[n].hasOwnProperty('value')) {
									extraInputs.push(
										$('<input type="hidden" name="' + s.extraData[n].name + '">', ownerDocument).val(s.extraData[n].value)
											.appendTo(form)[0]);
								} else {
									extraInputs.push(
										$('<input type="hidden" name="' + n + '">', ownerDocument).val(s.extraData[n])
											.appendTo(form)[0]);
								}
							}
						}
					}

					if (!s.iframeTarget) {
						// add iframe to doc and submit the form
						$io.appendTo($body);
					}

					if (io.attachEvent) {
						io.attachEvent('onload', cb);
					} else {
						io.addEventListener('load', cb, false);
					}

					setTimeout(checkState, 15);

					try {
						form.submit();

					} catch (err) {
						// just in case form has element with name/id of 'submit'
						var submitFn = document.createElement('form').submit;

						submitFn.apply(form);
					}

				} finally {
					// reset attrs and remove "extra" input elements
					form.setAttribute('action', a);
					form.setAttribute('enctype', et); // #380
					if (t) {
						form.setAttribute('target', t);
					} else {
						$form.removeAttr('target');
					}
					$(extraInputs).remove();
				}
			}

			if (s.forceSync) {
				doSubmit();
			} else {
				setTimeout(doSubmit, 10); // this lets dom updates render
			}

			var data, doc, domCheckCount = 50, callbackProcessed;

			function cb(e) {
				if (xhr.aborted || callbackProcessed) {
					return;
				}

				doc = getDoc(io);
				if (!doc) {
					log('cannot access response document');
					e = SERVER_ABORT;
				}
				if (e === CLIENT_TIMEOUT_ABORT && xhr) {
					xhr.abort('timeout');
					deferred.reject(xhr, 'timeout');

					return;

				}
				if (e === SERVER_ABORT && xhr) {
					xhr.abort('server abort');
					deferred.reject(xhr, 'error', 'server abort');

					return;
				}

				if (!doc || doc.location.href === s.iframeSrc) {
					// response not received yet
					if (!timedOut) {
						return;
					}
				}

				if (io.detachEvent) {
					io.detachEvent('onload', cb);
				} else {
					io.removeEventListener('load', cb, false);
				}

				var status = 'success', errMsg;

				try {
					if (timedOut) {
						throw 'timeout';
					}

					var isXml = s.dataType === 'xml' || doc.XMLDocument || $.isXMLDoc(doc);

					log('isXml=' + isXml);

					if (!isXml && window.opera && (doc.body === null || !doc.body.innerHTML)) {
						if (--domCheckCount) {
							// in some browsers (Opera) the iframe DOM is not always traversable when
							// the onload callback fires, so we loop a bit to accommodate
							log('requeing onLoad callback, DOM not available');
							setTimeout(cb, 250);

							return;
						}
						// let this fall through because server response could be an empty document
						// log('Could not access iframe DOM after mutiple tries.');
						// throw 'DOMException: not available';
					}

					// log('response detected');
					var docRoot = doc.body ? doc.body : doc.documentElement;

					xhr.responseText = docRoot ? docRoot.innerHTML : null;
					xhr.responseXML = doc.XMLDocument ? doc.XMLDocument : doc;
					if (isXml) {
						s.dataType = 'xml';
					}
					xhr.getResponseHeader = function(header){
						var headers = {'content-type': s.dataType};

						return headers[header.toLowerCase()];
					};
					// support for XHR 'status' & 'statusText' emulation :
					if (docRoot) {
						xhr.status = Number(docRoot.getAttribute('status')) || xhr.status;
						xhr.statusText = docRoot.getAttribute('statusText') || xhr.statusText;
					}

					var dt = (s.dataType || '').toLowerCase();
					var scr = /(json|script|text)/.test(dt);

					if (scr || s.textarea) {
						// see if user embedded response in textarea
						var ta = doc.getElementsByTagName('textarea')[0];

						if (ta) {
							xhr.responseText = ta.value;
							// support for XHR 'status' & 'statusText' emulation :
							xhr.status = Number(ta.getAttribute('status')) || xhr.status;
							xhr.statusText = ta.getAttribute('statusText') || xhr.statusText;

						} else if (scr) {
							// account for browsers injecting pre around json response
							var pre = doc.getElementsByTagName('pre')[0];
							var b = doc.getElementsByTagName('body')[0];

							if (pre) {
								xhr.responseText = pre.textContent ? pre.textContent : pre.innerText;
							} else if (b) {
								xhr.responseText = b.textContent ? b.textContent : b.innerText;
							}
						}

					} else if (dt === 'xml' && !xhr.responseXML && xhr.responseText) {
						xhr.responseXML = toXml(xhr.responseText);			// eslint-disable-line no-use-before-define
					}

					try {
						data = httpData(xhr, dt, s);						// eslint-disable-line no-use-before-define

					} catch (err) {
						status = 'parsererror';
						xhr.error = errMsg = (err || status);
					}

				} catch (err) {
					log('error caught: ', err);
					status = 'error';
					xhr.error = errMsg = (err || status);
				}

				if (xhr.aborted) {
					log('upload aborted');
					status = null;
				}

				if (xhr.status) { // we've set xhr.status
					status = ((xhr.status >= 200 && xhr.status < 300) || xhr.status === 304) ? 'success' : 'error';
				}

				// ordering of these callbacks/triggers is odd, but that's how $.ajax does it
				if (status === 'success') {
					if (s.success) {
						s.success.call(s.context, data, 'success', xhr);
					}

					deferred.resolve(xhr.responseText, 'success', xhr);

					if (g) {
						$.event.trigger('ajaxSuccess', [xhr, s]);
					}

				} else if (status) {
					if (typeof errMsg === 'undefined') {
						errMsg = xhr.statusText;
					}
					if (s.error) {
						s.error.call(s.context, xhr, status, errMsg);
					}
					deferred.reject(xhr, 'error', errMsg);
					if (g) {
						$.event.trigger('ajaxError', [xhr, s, errMsg]);
					}
				}

				if (g) {
					$.event.trigger('ajaxComplete', [xhr, s]);
				}

				if (g && !--$.active) {
					$.event.trigger('ajaxStop');
				}

				if (s.complete) {
					s.complete.call(s.context, xhr, status);
				}

				callbackProcessed = true;
				if (s.timeout) {
					clearTimeout(timeoutHandle);
				}

				// clean up
				setTimeout(function() {
					if (!s.iframeTarget) {
						$io.remove();
					} else { // adding else to clean up existing iframe response.
						$io.attr('src', s.iframeSrc);
					}
					xhr.responseXML = null;
				}, 100);
			}

			var toXml = $.parseXML || function(s, doc) { // use parseXML if available (jQuery 1.5+)
				if (window.ActiveXObject) {
					doc = new ActiveXObject('Microsoft.XMLDOM');
					doc.async = 'false';
					doc.loadXML(s);

				} else {
					doc = (new DOMParser()).parseFromString(s, 'text/xml');
				}

				return (doc && doc.documentElement && doc.documentElement.nodeName !== 'parsererror') ? doc : null;
			};
			var parseJSON = $.parseJSON || function(s) {
				/* jslint evil:true */
				return window['eval']('(' + s + ')');			// eslint-disable-line dot-notation
			};

			var httpData = function(xhr, type, s) { // mostly lifted from jq1.4.4

				var ct = xhr.getResponseHeader('content-type') || '',
					xml = ((type === 'xml' || !type) && ct.indexOf('xml') >= 0),
					data = xml ? xhr.responseXML : xhr.responseText;

				if (xml && data.documentElement.nodeName === 'parsererror') {
					if ($.error) {
						$.error('parsererror');
					}
				}
				if (s && s.dataFilter) {
					data = s.dataFilter(data, type);
				}
				if (typeof data === 'string') {
					if ((type === 'json' || !type) && ct.indexOf('json') >= 0) {
						data = parseJSON(data);
					} else if ((type === 'script' || !type) && ct.indexOf('javascript') >= 0) {
						$.globalEval(data);
					}
				}

				return data;
			};

			return deferred;
		}
	};

	/**
	 * ajaxForm() provides a mechanism for fully automating form submission.
	 *
	 * The advantages of using this method instead of ajaxSubmit() are:
	 *
	 * 1: This method will include coordinates for <input type="image"> elements (if the element
	 *	is used to submit the form).
	 * 2. This method will include the submit element's name/value data (for the element that was
	 *	used to submit the form).
	 * 3. This method binds the submit() method to the form for you.
	 *
	 * The options argument for ajaxForm works exactly as it does for ajaxSubmit. ajaxForm merely
	 * passes the options argument along after properly binding events for submit elements and
	 * the form itself.
	 */
	$.fn.ajaxForm = function(options, data, dataType, onSuccess) {
		if (typeof options === 'string' || (options === false && arguments.length > 0)) {
			options = {
				'url'      : options,
				'data'     : data,
				'dataType' : dataType
			};

			if (typeof onSuccess === 'function') {
				options.success = onSuccess;
			}
		}

		options = options || {};
		options.delegation = options.delegation && $.isFunction($.fn.on);

		// in jQuery 1.3+ we can fix mistakes with the ready state
		if (!options.delegation && this.length === 0) {
			var o = {s: this.selector, c: this.context};

			if (!$.isReady && o.s) {
				log('DOM not ready, queuing ajaxForm');
				$(function() {
					$(o.s, o.c).ajaxForm(options);
				});

				return this;
			}

			// is your DOM ready?  http://docs.jquery.com/Tutorials:Introducing_$(document).ready()
			log('terminating; zero elements found by selector' + ($.isReady ? '' : ' (DOM not ready)'));

			return this;
		}

		if (options.delegation) {
			$(document)
				.off('submit.form-plugin', this.selector, doAjaxSubmit)
				.off('click.form-plugin', this.selector, captureSubmittingElement)
				.on('submit.form-plugin', this.selector, options, doAjaxSubmit)
				.on('click.form-plugin', this.selector, options, captureSubmittingElement);

			return this;
		}

		if (options.beforeFormUnbind) {
			options.beforeFormUnbind(this, options);
		}

		return this.ajaxFormUnbind()
			.on('submit.form-plugin', options, doAjaxSubmit)
			.on('click.form-plugin', options, captureSubmittingElement);
	};

	// private event handlers
	function doAjaxSubmit(e) {
		/* jshint validthis:true */
		var options = e.data;

		if (!e.isDefaultPrevented()) { // if event has been canceled, don't proceed
			e.preventDefault();
			$(e.target).closest('form').ajaxSubmit(options); // #365
		}
	}

	function captureSubmittingElement(e) {
		/* jshint validthis:true */
		var target = e.target;
		var $el = $(target);

		if (!$el.is('[type=submit],[type=image]')) {
			// is this a child element of the submit el?  (ex: a span within a button)
			var t = $el.closest('[type=submit]');

			if (t.length === 0) {
				return;
			}
			target = t[0];
		}

		var form = target.form;

		form.clk = target;

		if (target.type === 'image') {
			if (typeof e.offsetX !== 'undefined') {
				form.clk_x = e.offsetX;
				form.clk_y = e.offsetY;

			} else if (typeof $.fn.offset === 'function') {
				var offset = $el.offset();

				form.clk_x = e.pageX - offset.left;
				form.clk_y = e.pageY - offset.top;

			} else {
				form.clk_x = e.pageX - target.offsetLeft;
				form.clk_y = e.pageY - target.offsetTop;
			}
		}
		// clear form vars
		setTimeout(function() {
			form.clk = form.clk_x = form.clk_y = null;
		}, 100);
	}

	// ajaxFormUnbind unbinds the event handlers that were bound by ajaxForm
	$.fn.ajaxFormUnbind = function() {
		return this.off('submit.form-plugin click.form-plugin');
	};

	/**
	 * formToArray() gathers form element data into an array of objects that can
	 * be passed to any of the following ajax functions: $.get, $.post, or load.
	 * Each object in the array has both a 'name' and 'value' property. An example of
	 * an array for a simple login form might be:
	 *
	 * [ { name: 'username', value: 'jresig' }, { name: 'password', value: 'secret' } ]
	 *
	 * It is this array that is passed to pre-submit callback functions provided to the
	 * ajaxSubmit() and ajaxForm() methods.
	 */
	$.fn.formToArray = function(semantic, elements, filtering) {
		var a = [];

		if (this.length === 0) {
			return a;
		}

		var form = this[0];
		var formId = this.attr('id');
		var els = (semantic || typeof form.elements === 'undefined') ? form.getElementsByTagName('*') : form.elements;
		var els2;

		if (els) {
			els = $.makeArray(els); // convert to standard array
		}

		// #386; account for inputs outside the form which use the 'form' attribute
		// FinesseRus: in non-IE browsers outside fields are already included in form.elements.
		if (formId && (semantic || /(Edge|Trident)\//.test(navigator.userAgent))) {
			els2 = $(':input[form="' + formId + '"]').get(); // hat tip @thet
			if (els2.length) {
				els = (els || []).concat(els2);
			}
		}

		if (!els || !els.length) {
			return a;
		}

		if ($.isFunction(filtering)) {
			els = $.map(els, filtering);
		}

		var i, j, n, v, el, max, jmax;

		for (i = 0, max = els.length; i < max; i++) {
			el = els[i];
			n = el.name;
			if (!n || el.disabled) {
				continue;
			}

			if (semantic && form.clk && el.type === 'image') {
				// handle image inputs on the fly when semantic == true
				if (form.clk === el) {
					a.push({name: n, value: $(el).val(), type: el.type});
					a.push({name: n + '.x', value: form.clk_x}, {name: n + '.y', value: form.clk_y});
				}
				continue;
			}

			v = $.fieldValue(el, true);
			if (v && v.constructor === Array) {
				if (elements) {
					elements.push(el);
				}
				for (j = 0, jmax = v.length; j < jmax; j++) {
					a.push({name: n, value: v[j]});
				}

			} else if (feature.fileapi && el.type === 'file') {
				if (elements) {
					elements.push(el);
				}

				var files = el.files;

				if (files.length) {
					for (j = 0; j < files.length; j++) {
						a.push({name: n, value: files[j], type: el.type});
					}
				} else {
					// #180
					a.push({name: n, value: '', type: el.type});
				}

			} else if (v !== null && typeof v !== 'undefined') {
				if (elements) {
					elements.push(el);
				}
				a.push({name: n, value: v, type: el.type, required: el.required});
			}
		}

		if (!semantic && form.clk) {
			// input type=='image' are not found in elements array! handle it here
			var $input = $(form.clk), input = $input[0];

			n = input.name;

			if (n && !input.disabled && input.type === 'image') {
				a.push({name: n, value: $input.val()});
				a.push({name: n + '.x', value: form.clk_x}, {name: n + '.y', value: form.clk_y});
			}
		}

		return a;
	};

	/**
	 * Serializes form data into a 'submittable' string. This method will return a string
	 * in the format: name1=value1&amp;name2=value2
	 */
	$.fn.formSerialize = function(semantic) {
		// hand off to jQuery.param for proper encoding
		return $.param(this.formToArray(semantic));
	};

	/**
	 * Serializes all field elements in the jQuery object into a query string.
	 * This method will return a string in the format: name1=value1&amp;name2=value2
	 */
	$.fn.fieldSerialize = function(successful) {
		var a = [];

		this.each(function() {
			var n = this.name;

			if (!n) {
				return;
			}

			var v = $.fieldValue(this, successful);

			if (v && v.constructor === Array) {
				for (var i = 0, max = v.length; i < max; i++) {
					a.push({name: n, value: v[i]});
				}

			} else if (v !== null && typeof v !== 'undefined') {
				a.push({name: this.name, value: v});
			}
		});

		// hand off to jQuery.param for proper encoding
		return $.param(a);
	};

	/**
	 * Returns the value(s) of the element in the matched set. For example, consider the following form:
	 *
	 *	<form><fieldset>
	 *		<input name="A" type="text">
	 *		<input name="A" type="text">
	 *		<input name="B" type="checkbox" value="B1">
	 *		<input name="B" type="checkbox" value="B2">
	 *		<input name="C" type="radio" value="C1">
	 *		<input name="C" type="radio" value="C2">
	 *	</fieldset></form>
	 *
	 *	var v = $('input[type=text]').fieldValue();
	 *	// if no values are entered into the text inputs
	 *	v === ['','']
	 *	// if values entered into the text inputs are 'foo' and 'bar'
	 *	v === ['foo','bar']
	 *
	 *	var v = $('input[type=checkbox]').fieldValue();
	 *	// if neither checkbox is checked
	 *	v === undefined
	 *	// if both checkboxes are checked
	 *	v === ['B1', 'B2']
	 *
	 *	var v = $('input[type=radio]').fieldValue();
	 *	// if neither radio is checked
	 *	v === undefined
	 *	// if first radio is checked
	 *	v === ['C1']
	 *
	 * The successful argument controls whether or not the field element must be 'successful'
	 * (per http://www.w3.org/TR/html4/interact/forms.html#successful-controls).
	 * The default value of the successful argument is true. If this value is false the value(s)
	 * for each element is returned.
	 *
	 * Note: This method *always* returns an array. If no valid value can be determined the
	 *	array will be empty, otherwise it will contain one or more values.
	 */
	$.fn.fieldValue = function(successful) {
		for (var val = [], i = 0, max = this.length; i < max; i++) {
			var el = this[i];
			var v = $.fieldValue(el, successful);

			if (v === null || typeof v === 'undefined' || (v.constructor === Array && !v.length)) {
				continue;
			}

			if (v.constructor === Array) {
				$.merge(val, v);
			} else {
				val.push(v);
			}
		}

		return val;
	};

	/**
	 * Returns the value of the field element.
	 */
	$.fieldValue = function(el, successful) {
		var n = el.name, t = el.type, tag = el.tagName.toLowerCase();

		if (typeof successful === 'undefined') {
			successful = true;
		}

		/* eslint-disable no-mixed-operators */
		if (successful && (!n || el.disabled || t === 'reset' || t === 'button' ||
			(t === 'checkbox' || t === 'radio') && !el.checked ||
			(t === 'submit' || t === 'image') && el.form && el.form.clk !== el ||
			tag === 'select' && el.selectedIndex === -1)) {
		/* eslint-enable no-mixed-operators */
			return null;
		}

		if (tag === 'select') {
			var index = el.selectedIndex;

			if (index < 0) {
				return null;
			}

			var a = [], ops = el.options;
			var one = (t === 'select-one');
			var max = (one ? index + 1 : ops.length);

			for (var i = (one ? index : 0); i < max; i++) {
				var op = ops[i];

				if (op.selected && !op.disabled) {
					var v = op.value;

					if (!v) { // extra pain for IE...
						v = (op.attributes && op.attributes.value && !(op.attributes.value.specified)) ? op.text : op.value;
					}

					if (one) {
						return v;
					}

					a.push(v);
				}
			}

			return a;
		}

		return $(el).val().replace(rCRLF, '\r\n');
	};

	/**
	 * Clears the form data. Takes the following actions on the form's input fields:
	 *  - input text fields will have their 'value' property set to the empty string
	 *  - select elements will have their 'selectedIndex' property set to -1
	 *  - checkbox and radio inputs will have their 'checked' property set to false
	 *  - inputs of type submit, button, reset, and hidden will *not* be effected
	 *  - button elements will *not* be effected
	 */
	$.fn.clearForm = function(includeHidden) {
		return this.each(function() {
			$('input,select,textarea', this).clearFields(includeHidden);
		});
	};

	/**
	 * Clears the selected form elements.
	 */
	$.fn.clearFields = $.fn.clearInputs = function(includeHidden) {
		var re = /^(?:color|date|datetime|email|month|number|password|range|search|tel|text|time|url|week)$/i; // 'hidden' is not in this list

		return this.each(function() {
			var t = this.type, tag = this.tagName.toLowerCase();

			if (re.test(t) || tag === 'textarea') {
				this.value = '';

			} else if (t === 'checkbox' || t === 'radio') {
				this.checked = false;

			} else if (tag === 'select') {
				this.selectedIndex = -1;

			} else if (t === 'file') {
				if (/MSIE/.test(navigator.userAgent)) {
					$(this).replaceWith($(this).clone(true));
				} else {
					$(this).val('');
				}

			} else if (includeHidden) {
				// includeHidden can be the value true, or it can be a selector string
				// indicating a special test; for example:
				// $('#myForm').clearForm('.special:hidden')
				// the above would clean hidden inputs that have the class of 'special'
				if ((includeHidden === true && /hidden/.test(t)) ||
					(typeof includeHidden === 'string' && $(this).is(includeHidden))) {
					this.value = '';
				}
			}
		});
	};

	/**
	 * Resets the form data or individual elements. Takes the following actions
	 * on the selected tags:
	 * - all fields within form elements will be reset to their original value
	 * - input / textarea / select fields will be reset to their original value
	 * - option / optgroup fields (for multi-selects) will defaulted individually
	 * - non-multiple options will find the right select to default
	 * - label elements will be searched against its 'for' attribute
	 * - all others will be searched for appropriate children to default
	 */
	$.fn.resetForm = function() {
		return this.each(function() {
			var el = $(this);
			var tag = this.tagName.toLowerCase();

			switch (tag) {
			case 'input':
				this.checked = this.defaultChecked;
				// fall through

			case 'textarea':
				this.value = this.defaultValue;

				return true;

			case 'option':
			case 'optgroup':
				var select = el.parents('select');

				if (select.length && select[0].multiple) {
					if (tag === 'option') {
						this.selected = this.defaultSelected;
					} else {
						el.find('option').resetForm();
					}
				} else {
					select.resetForm();
				}

				return true;

			case 'select':
				el.find('option').each(function(i) {				// eslint-disable-line consistent-return
					this.selected = this.defaultSelected;
					if (this.defaultSelected && !el[0].multiple) {
						el[0].selectedIndex = i;

						return false;
					}
				});

				return true;

			case 'label':
				var forEl = $(el.attr('for'));
				var list = el.find('input,select,textarea');

				if (forEl[0]) {
					list.unshift(forEl[0]);
				}

				list.resetForm();

				return true;

			case 'form':
				// guard against an input with the name of 'reset'
				// note that IE reports the reset function as an 'object'
				if (typeof this.reset === 'function' || (typeof this.reset === 'object' && !this.reset.nodeType)) {
					this.reset();
				}

				return true;

			default:
				el.find('form,input,label,select,textarea').resetForm();

				return true;
			}
		});
	};

	/**
	 * Enables or disables any matching elements.
	 */
	$.fn.enable = function(b) {
		if (typeof b === 'undefined') {
			b = true;
		}

		return this.each(function() {
			this.disabled = !b;
		});
	};

	/**
	 * Checks/unchecks any matching checkboxes or radio buttons and
	 * selects/deselects and matching option elements.
	 */
	$.fn.selected = function(select) {
		if (typeof select === 'undefined') {
			select = true;
		}

		return this.each(function() {
			var t = this.type;

			if (t === 'checkbox' || t === 'radio') {
				this.checked = select;

			} else if (this.tagName.toLowerCase() === 'option') {
				var $sel = $(this).parent('select');

				if (select && $sel[0] && $sel[0].type === 'select-one') {
					// deselect all other options
					$sel.find('option').selected(false);
				}

				this.selected = select;
			}
		});
	};

	// expose debug var
	$.fn.ajaxSubmit.debug = false;

	// helper fn for console logging
	function log() {
		if (!$.fn.ajaxSubmit.debug) {
			return;
		}

		var msg = '[internalObj.form] ' + Array.prototype.join.call(arguments, '');

		if (window.console && window.console.log) {
			window.console.log(msg);

		} else if (window.opera && window.opera.postError) {
			window.opera.postError(msg);
		}
	}
}));