/*
 * 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: 0.9
 * @author jQuery Community
 */
//jQuery.noConflict();
jQuery.fn.ajaxSubmit = function(options) {
	if (typeof options == 'function')
	options = { success: options };
	
	options = jQuery.extend({
	url:    this.attr('action') || '',
	method: this.attr('method') || 'GET'
	}, options || {});
	
	// remap deprecated options (temporarily)
	options.success = options.success || options.after;
	options.beforeSubmit = options.beforeSubmit || options.before;
	options.type = options.type || options.method;
	
	var a = this.formToArray(options.semantic);
	
	// give pre-submit callback an opportunity to abort the submit
	if (options.beforeSubmit && options.beforeSubmit(a, this, options) === false) return this;
	
	var q = jQuery.param(a);
	
	if (options.type.toUpperCase() == 'GET') {
	// if url already has a '?' then append args after '&'
	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 $form = this, callbacks = [];
	if (options.resetForm) callbacks.push(function() { $form.resetForm(); });
	if (options.clearForm) callbacks.push(function() { $form.clearForm(); });
	
	// 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, 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);
	};
	
	jQuery.ajax(options);
	return this;
};


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') { // try to use dimensions plugin
					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;
				}
			}
			// clear form vars
			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") {
		// handle image inputs on the fly when semantic == true
		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) {
		// input type=='image' are not found in elements array! handle them here
		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) {
	//hand off to jQuery.param for proper encoding
	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});
	});
	//hand off to jQuery.param for proper encoding
	return jQuery.param(a);
};

jQuery.fn.fieldValue = function(successful) {
	var cbVal, cbName;
	// loop until we find a value
	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;
		// for checkboxes, consider multiple elements, for everything else just return first valid value
		if (el.type != 'checkbox') return v;
		
		cbName = cbName || el.name;
		if (cbName != el.name) // return if we hit a checkbox with a different name
		return cbVal;
		cbVal = cbVal || [];
		cbVal.push(v);
	}
	return cbVal;
};

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 == '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) {
			// extra pain for IE...
			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() {
		// 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();
	});
};