/*
 * jQuery form plugin
 * @requires jQuery v1.0.3
 *
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 *
 * Revision: $Id$
 * Version: .96
 */
jQuery.fn.ajaxSubmit = function(options) {
	if (typeof options == 'function')
		options = { success: options };
	options = jQuery.extend({
		url:  this.attr('action') || window.location,
		type: this.attr('method') || 'GET'
	}, options || {});
	var a = this.formToArray(options.semantic);
	if (options.beforeSubmit && options.beforeSubmit(a, this, options) === false) return this;
	var veto = {};
	jQuery.event.trigger('form.submit.validate', [a, this, options, veto]);
	if (veto.veto)
		return this;
	var q = jQuery.param(a);
	if (options.type.toUpperCase() == 'GET') {
		options.url += (options.url.indexOf('?') >= 0 ? '&' : '?') + q;
		options.data = null;
	}
	else
		options.data = q;
	var $form = this, callbacks = [];
	if (options.resetForm) callbacks.push(function() { $form.resetForm(); });
	if (options.clearForm) callbacks.push(function() { $form.clearForm(); });
	if (!options.dataType && options.target) {
		var oldSuccess = options.success || function(){};
		callbacks.push(function(data, status) {
			jQuery(options.target).attr("innerHTML", data).evalScripts().each(oldSuccess, [data, status]);
		});
	}
	else if (options.success)
		callbacks.push(options.success);
	options.success = function(data, status) {
		for (var i=0, max=callbacks.length; i < max; i++)
			callbacks[i](data, status);
	};
	var files = jQuery('input:file', this).fieldValue();
	var found = false;
	for (var j=0; j < files.length; j++)
		if (files[j])
			found = true;
	if (options.iframe || found)
		fileUpload();
	else
		jQuery.ajax(options);
	jQuery.event.trigger('form.submit.notify', [this, options]);
	return this;
	function fileUpload() {
		var form = $form[0];
		var opts = jQuery.extend({}, jQuery.ajaxSettings, options);
		var id = 'jqFormIO' + jQuery.fn.ajaxSubmit.counter++;
		var $io = jQuery('<iframe id="' + id + '" name="' + id + '" />');
		var io = $io[0];
		var op8 = jQuery.browser.opera && window.opera.version() < 9;
		if (jQuery.browser.msie || op8) io.src = 'javascript:false;document.write("");';
		$io.css({ position: 'absolute', top: '-1000px', left: '-1000px' });
		form.method = 'POST';
		form.encoding ? form.encoding = 'multipart/form-data' : form.enctype = 'multipart/form-data';
		var xhr = {
			responseText: null,
			responseXML: null,
			status: 0,
			statusText: 'n/a',
			getAllResponseHeaders: function() {},
			getResponseHeader: function() {},
			setRequestHeader: function() {}
		};
		var g = opts.global;
		if (g && ! jQuery.active++) jQuery.event.trigger("ajaxStart");
		if (g) jQuery.event.trigger("ajaxSend", [xhr, opts]);
		var cbInvoked = 0;
		var timedOut = 0;
		setTimeout(function() {
			$io.appendTo('body');
			io.attachEvent ? io.attachEvent('onload', cb) : io.addEventListener('load', cb, false);
			form.action = opts.url;
			var t = form.target;
			form.target = id;
			if (opts.timeout)
				setTimeout(function() { timedOut = true; cb(); }, opts.timeout);
			form.submit();
			form.target = t;
		}, 10);
		function cb() {
			if (cbInvoked++) return;
			io.detachEvent ? io.detachEvent('onload', cb) : io.removeEventListener('load', cb, false);
			var ok = true;
			try {
				if (timedOut) throw 'timeout';
				var data, doc;
				doc = io.contentWindow ? io.contentWindow.document : io.contentDocument ? io.contentDocument : io.document;
				xhr.responseText = doc.body ? doc.body.innerHTML : null;
				xhr.responseXML = doc.XMLDocument ? doc.XMLDocument : doc;
				if (opts.dataType == 'json' || opts.dataType == 'script') {
					var ta = doc.getElementsByTagName('textarea')[0];
					data = ta ? ta.value : xhr.responseText;
					if (opts.dataType == 'json')
						eval("data = " + data);
					else
						jQuery.globalEval(data);
				}
				else if (opts.dataType == 'xml') {
					data = xhr.responseXML;
					if (!data && xhr.responseText != null)
						data = toXml(xhr.responseText);
				}
				else {
					data = xhr.responseText;
				}
			}
			catch(e){
				ok = false;
				jQuery.handleError(opts, xhr, 'error', e);
			}
			if (ok) {
				opts.success(data, 'success');
				if (g) jQuery.event.trigger("ajaxSuccess", [xhr, opts]);
			}
			if (g) jQuery.event.trigger("ajaxComplete", [xhr, opts]);
			if (g && ! --jQuery.active) jQuery.event.trigger("ajaxStop");
			if (opts.complete) opts.complete(xhr, ok ? 'success' : 'error');
			setTimeout(function() {
				$io.remove();
				xhr.responseXML = null;
			}, 100);
		};
		function toXml(s, doc) {
			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.tagName != 'parsererror') ? doc : null;
		}
	};
};
jQuery.fn.ajaxSubmit.counter = 0;
jQuery.fn.ajaxForm = function(options) {
	return this.each(function() {
		jQuery("input:submit,input:image,button:submit", this).click(function(ev) {
			var $form = this.form;
			$form.clk = this;
			if (this.type == 'image') {
				if (ev.offsetX != undefined) {
					$form.clk_x = ev.offsetX;
					$form.clk_y = ev.offsetY;
				} else if (typeof jQuery.fn.offset == 'function') {
					var offset = jQuery(this).offset();
					$form.clk_x = ev.pageX - offset.left;
					$form.clk_y = ev.pageY - offset.top;
				} else {
					$form.clk_x = ev.pageX - this.offsetLeft;
					$form.clk_y = ev.pageY - this.offsetTop;
				}
			}
			setTimeout(function() {
				$form.clk = $form.clk_x = $form.clk_y = null;
				}, 10);
		})
	}).submit(function(e) {
		jQuery(this).ajaxSubmit(options);
		return false;
	});
};
jQuery.fn.formToArray = function(semantic) {
	var a = [];
	if (this.length == 0) return a;
	var form = this[0];
	var els = semantic ? form.getElementsByTagName('*') : form.elements;
	if (!els) return a;
	for(var i=0, max=els.length; i < max; i++) {
		var el = els[i];
		var n = el.name;
		if (!n) continue;
		if (semantic && form.clk && el.type == "image") {
			if(!el.disabled && form.clk == el)
				a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y});
			continue;
		}
		var v = jQuery.fieldValue(el, true);
		if (v === null) continue;
		if (v.constructor == Array) {
			for(var j=0, jmax=v.length; j < jmax; j++)
				a.push({name: n, value: v[j]});
		}
		else
			a.push({name: n, value: v});
	}
	if (!semantic && form.clk) {
		var inputs = form.getElementsByTagName("input");
		for(var i=0, max=inputs.length; i < max; i++) {
			var input = inputs[i];
			var n = input.name;
			if(n && !input.disabled && input.type == "image" && form.clk == input)
				a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y});
		}
	}
	return a;
};
jQuery.fn.formSerialize = function(semantic) {
	return jQuery.param(this.formToArray(semantic));
};
jQuery.fn.fieldSerialize = function(successful) {
	var a = [];
	this.each(function() {
		var n = this.name;
		if (!n) return;
		var v = jQuery.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});
	});
	return jQuery.param(a);
};
jQuery.fn.fieldValue = function(successful) {
	var val=[], name;
	for (var i=0, max=this.length; i < max; i++) {
		var el = this[i];
		var v = jQuery.fieldValue(el, successful);
		if (v === null || typeof v == 'undefined' || (v.constructor == Array && !v.length))
			continue;
		name = name || el.name;
		if (name != el.name)
			continue;
		v.constructor == Array ? jQuery.merge(val, v) : val.push(v);
	}
	return val;
};
jQuery.fieldValue = function(el, successful) {
	var n = el.name, t = el.type, tag = el.tagName.toLowerCase();
	if (typeof successful == 'undefined') successful = true;
	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))
			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) {
				var v = jQuery.browser.msie && !(op.attributes['value'].specified) ? op.text : op.value;
				if (one) return v;
				a.push(v);
			}
		}
		return a;
	}
	return el.value;
};
jQuery.fn.clearForm = function() {
	return this.each(function() {
		jQuery('input,select,textarea', this).clearFields();
	});
};
jQuery.fn.clearFields = jQuery.fn.clearInputs = function() {
	return this.each(function() {
		var t = this.type, tag = this.tagName.toLowerCase();
		if (t == 'text' || t == 'password' || tag == 'textarea')
			this.value = '';
		else if (t == 'checkbox' || t == 'radio')
			this.checked = false;
		else if (tag == 'select')
			this.selectedIndex = -1;
	});
};
jQuery.fn.resetForm = function() {
	return this.each(function() {
		if (typeof this.reset == 'function' || (typeof this.reset == 'object' && !this.reset.nodeType))
			this.reset();
	});
};