【JavaScript 封装库】BETA 3.0 测试版发布！

 /*
     源码作者: 石不易(Louis Shi)
     联系方式: http://www.shibuyi.net
     ===================================================================================================
     程序名称: JavaScript 封装库 BETA 3.0 版
     迭代版本: BETA 2.0
     插件总数: 8 个
     库方法数: 20 个
     功能总数: 48 个
     新增总数: 7 个
     删除总数: 0 个
     追加功能:
         1. 新增“插件库”支持, 可自由扩展网页特效插件
         2. 新增“元素节点选择器”, 元素节点操纵简便性大大提升, 可读性加强
         3. 新增“HTML DOM 加载”, 节省外部文件加载耗时
         4. 库方法: 新增“CSS 处理”, 分离调用代码可读性加强
         5. 库方法: 新增“class 处理”, 分离调用代码可读性加强
         ...
     优化功能:
         1. 优化节点定位并删除了 name 方式定位, 遵循 W3C 原则
         2. 优化节点事件绑定, 集中至“nodeEvent”方法同一调用, 可读性、扩展性、维护性大大加强
         3. 库方法: 优化“清除空白节点”, 采用倒序遍历, 删除更加彻底简便
         4. 库方法: 优化“清除注释节点”, 采用倒序遍历, 删除更加彻底简便
         ....
     删除功能:
         无
 */
 
 // 实例化基础库
 $ = function () {
     return arguments.length == 0 ? new Base() : new Base(arguments);
 };
 
 // 基础库构造方法
 var Base = function (nodes) {
     this.info = '无节点';
     this.elements = [];
     if (typeof nodes == 'object') {
         var elements = [], node = null;
         for (var i = 0; i < nodes.length; i ++) {
             node = nodes[i];
             if (typeof node == 'string') { // 元素节点选择器
                 // 全局或局部
                 if (this.elements.length == 0) this.elements.push(document);
                 var patternSpace = /[\s\t　]+/;
                 if (patternSpace.test(node)) { // 多层
                     node = node.split(patternSpace);
                     for (var j = 0; j < node.length; j ++) {
                         if (j == (node.length - 1)) {
                             elements.push(this.selector(node[j]).getNodes());
                         } else {
                             this.selector(node[j]);
                         }
                     }
                 } else { // 单层
                     elements.push(this.selector(node).getNodes());
                 }
                 this.elements = [];
             } else if (typeof node == 'object' && (node == window || typeof node.nodeType != 'undefined')) { // 节点对象
                 this.elements.push(node);
             } else if (typeof node == 'function') { // HTML DOM 加载
                 this.htmlLoaded(node);
             }
         }
         if (typeof elements != 'undefined') {
             for (var k = 0; k < elements.length; k ++) {
                 if (elements[k] instanceof Array) { // 集群
                     for (var l = 0; l < elements[k].length; l ++) {
                         if (elements[k][l] != this.info) this.elements.push(elements[k][l]);
                     }
                 } else { // 单一
                     if (elements[k] != this.info) this.elements.push(elements[k]);
                 }
             }
         }
     }
 };
 
 // 获取采集的所有节点
 Base.prototype.getNodes = function () {
     if (this.elements.length == 0) return this.info;
     if (this.elements.length == 1) return this.firstNode();
     return this.elements;
 };
 
 // 获取采集的首位节点
 Base.prototype.firstNode = function () {
     if (this.elements.length == 0) return this.info;
     return this.elements[0];
 };
 
 // 获取采集的末尾节点
 Base.prototype.lastNode = function () {
     if (this.elements.length == 0) return this.info;
     return this.elements[this.elements.length - 1];
 };
 
 // 获取 id 元素节点
 Base.prototype.getId = function (ids, positioner) {
     if (ids instanceof Array) { // 集群
         for (var i = 0; i < ids.length; i ++) {
             this.getId(ids[i], positioner);
         }
     } else { // 单一
         var selector = null, node = null;
         if (typeof positioner != 'undefined') { // 局部
             if (typeof positioner == 'object' && typeof positioner.nodeType != 'undefined') {
                 selector = positioner;
             } else {
                 if (!(selector = Base.positioner(positioner))) return this;
             }
         } else { // 全局
             selector = document;
         }
         if (selector instanceof Array) { // 集群
             for (var j = 0; j < selector.length; j ++) {
                 node = selector[j].getElementsByTagName('*');
                 for (var k = 0; k < node.length; k ++) {
                     if (node[k].id == ids) {
                         for (var i = 0; i < this.elements.length; i ++) {
                             if (this.elements[i] == node[k]) return this;
                         }
                         this.elements.push(node[k]);
                     }
                 }
             }
         } else { // 单一
             // 容错处理
             if (typeof selector.getElementById != 'undefined') {
                 node = selector.getElementById(ids);
                 if (node === null) return this;
                 for (var i = 0; i < this.elements.length; i ++) {
                     if (this.elements[i] == node) return this;
                 }
                 this.elements.push(node);
             } else {
                 node = selector.getElementsByTagName('*');
                 for (var j = 0; j < node.length; j ++) {
                     if (node[j].id == ids) {
                         for (var i = 0; i < this.elements.length; i ++) {
                             if (this.elements[i] == node[j]) return this;
                         }
                         this.elements.push(node[j]);
                     }
                 }
             }
         }
     }
     return this;
 };
 
 // 获取 tagName 元素节点
 Base.prototype.getTagName = function (tagName, positioner) {
     var selector = null, nodes = [];
     if (typeof positioner != 'undefined') { // 局部
         if (typeof positioner == 'object' && typeof positioner.nodeType != 'undefined') {
             selector = positioner;
         } else {
             if (!(selector = Base.positioner(positioner))) return this;
         }
     } else { // 全局
         selector  = document;
     }
     if (selector instanceof Array) { // 集群
         for (var j = 0; j < selector.length; j ++) {
             nodes = selector[j].getElementsByTagName(tagName);
             for (var i = 0; i < nodes.length; i ++) {
                 this.elements.push(nodes[i]);
             }
         }
     } else { // 单一
         nodes = selector.getElementsByTagName(tagName);
         for (var i = 0; i < nodes.length; i ++) {
             this.elements.push(nodes[i]);
         }
     }
     return this;
 };
 
 // 获取 class 元素节点
 Base.prototype.getClass = function (className, positioner) {
     var selector = null, nodes = [];
     if (typeof positioner != 'undefined') { // 局部
         if (typeof positioner == 'object' && typeof positioner.nodeType != 'undefined') {
             selector = positioner;
         } else {
             if (!(selector = Base.positioner(positioner))) return this;
         }
     } else {// 全局
         selector = document;
     }
     if (selector instanceof Array) { // 集群
         for (var j = 0; j < selector.length; j ++) {
             nodes = selector[j].getElementsByTagName('*');
             for (var i = 0; i < nodes.length; i ++) {
                 if (Base.hasClass(className, nodes[i])) this.elements.push(nodes[i]);
             }
         }
     } else { // 单一
         nodes = selector.getElementsByTagName('*');
         for (var i = 0; i < nodes.length; i ++) {
             if (Base.hasClass(className, nodes[i])) this.elements.push(nodes[i]);
         }
     }
     return this;
 };
 
 // 获取 name 元素节点
 Base.prototype.getName = function (name, positioner) {
     var selector = null, nodes = [];
     if (typeof positioner != 'undefined') { // 局部
         if (typeof positioner == 'object' && typeof positioner.nodeType != 'undefined') {
             selector = positioner;
         } else {
             if (!(selector = Base.positioner(positioner))) return this;
         }
     } else { // 全局
         selector = document;
     }
     if (selector instanceof Array) { // 集群
         for (var j = 0; j < selector.length; j ++) {
             nodes = selector[j].getElementsByTagName('*');
             for (var i = 0; i < nodes.length; i ++) {
                 if (nodes[i].name == name) this.elements.push(nodes[i]);
             }
         }
     } else { // 单一
         // 容错处理
         nodes = typeof selector.getElementsByName != 'undefined' ? selector.getElementsByName(name) : selector.getElementsByTagName('*');
         for (var i = 0; i < nodes.length; i ++) {
             if (nodes[i].name == name) this.elements.push(nodes[i]);
         }
     }
     return this;
 };
 
 // 元素节点选择器
 Base.prototype.selector = function (node) {
     if (typeof node == 'string') {
         var nodes = [], elements = [];
         var patternId = /([a-z]+)#([\w\-]+)/i;
         var patternClass = /([a-z]+)\.([\w\-]+)/i;
         var tagName = '', id = '', className = '';
         for (var i = 0; i < this.elements.length; i ++) {
             switch (node.charAt(0)) {
                 case '#' : // id
                     if ((nodes = $().getId(node.substring(1, node.length), this.elements[i]).getNodes()) != this.info) {
                         elements.push(nodes);
                     }
                     break;
                 case '.' : // class
                     if ((nodes = $().getClass(node.substring(1, node.length), this.elements[i]).getNodes()) != this.info) {
                         if (nodes instanceof Array) { // 集群
                             for (var j = 0; j < nodes.length; j ++) {
                                 elements.push(nodes[j]);
                             }
                         } else { // 单一
                             elements.push(nodes);
                         }
                     }
                     break;
                 default :
                     if (patternId.test(node)) { // tagName + id
                         tagName = patternId.exec(node)[1];
                         id = patternId.exec(node)[2];
                         if ((nodes = $().getTagName(tagName, this.elements[i]).getNodes()) != this.info) {
                             if (nodes instanceof Array) { // 集群
                                 for (var j = 0; j < nodes.length; j ++) {
                                     if (nodes[j].id == id) elements.push(nodes[j]);
                                 }
                             } else { // 单一
                                 if (nodes.id == id) elements.push(nodes);
                             }
                         }
                     } else if (patternClass.test(node)) { // tagName + class
                         tagName = patternClass.exec(node)[1];
                         className = patternClass.exec(node)[2];
                         if ((nodes = $().getTagName(tagName, this.elements[i]).getNodes()) != this.info) {
                             if (nodes instanceof Array) { // 集群
                                 for (var j = 0; j < nodes.length; j ++) {
                                     if (Base.hasClass(className, nodes[j])) elements.push(nodes[j]);
                                 }
                             } else { // 单一
                                 if (Base.hasClass(className, nodes)) elements.push(nodes);
                             }
                         }
                     } else { // tagName
                         if ((nodes = $().getTagName(node, this.elements[i]).getNodes()) != this.info) {
                             if (nodes instanceof Array) { // 集群
                                 for (var j = 0; j < nodes.length; j ++) {
                                     elements.push(nodes[j]);
                                 }
                             } else { // 单一
                                 elements.push(nodes);
                             }
                         }
                     }
             }
         }
         this.elements = elements;
     }
     return this;
 };
 
 // 获取与设置元素内容
 Base.prototype.html = function (text) {
     var html = [];
     for (var i = 0; i < this.elements.length; i ++) {
         if (typeof text != 'undefined') { // 设置
             this.elements[i].innerHTML = text;
         } else { // 获取
             html.push(this.elements[i].innerHTML);
         }
     }
     switch (html.length) {
         case 0 :
             return this;
             break;
         case 1 :
             return html[0];
             break;
         default :
             return html;
     }
 };
 
 // 获取与设置表单元素内容
 Base.prototype.value = function (text) {
     var value = [];
     for (var i = 0; i < this.elements.length; i ++) {
         if (typeof text != 'undefined') { // 设置
             if (typeof this.elements[i].value != 'undefined') this.elements[i].value = text;
         } else { // 获取
             if (typeof this.elements[i].value != 'undefined') value.push(this.elements[i].value);
         }
     }
     switch (value.length) {
         case 0 :
             return this;
             break;
         case 1 :
             return value[0];
             break;
         default :
             return value;
     }
 };
 
 // 获取与设置 CSS
 Base.prototype.css = function (cssKey, cssValue) {
     if (typeof cssValue != 'undefined' || cssKey instanceof Array) { // 设置
         if (cssKey instanceof Array) { // 集群
             var patternStyle = /^([a-z]+)[\s\t　]*=[\s\t　]*([\w\(=,\s\.#\/\\\'\"\-\)]+)$/i;
             var key = '', value = '';
             for (var i = 0; i < cssKey.length; i ++) {
                 if (patternStyle.test(cssKey[i])) {
                     key = patternStyle.exec(cssKey[i])[1];
                     value = patternStyle.exec(cssKey[i])[2];
                     this.css(key, value);
                 }
             }
         } else { // 单一
             for (var i = 0; i < this.elements.length; i ++) {
                 if (typeof this.elements[i].style[cssKey] != 'undefined') {
                     this.elements[i].style[cssKey] = cssValue;
                 }
             }
         }
     } else { // 获取
         var css = [], style = '';
         for (var i = 0; i < this.elements.length; i ++) {
             if (typeof (style = Tool.getStyle(cssKey, this.elements[i])) != 'undefined') css.push(style);
         }
         switch (css.length) {
             case 0 :
                 return this;
                 break;
             case 1 :
                 return css[0];
                 break;
             default :
                 return css;
                 break;
         }
     }
     return this;
 };
 
 // 添加 class 选择器
 Base.prototype.addClass = function (className) {
     if (className instanceof Array) { // 集群
         for (var i = 0; i < className.length; i ++) {
             this.addClass(className[i]);
         }
     } else { // 单一
         var space = '';
         for (var i = 0; i < this.elements.length; i ++) {
             space = this.elements[i].className != '' ? ' ' : space;
             if (!Base.hasClass(className, this.elements[i])) this.elements[i].className += space + className;
         }
     }
     return this;
 };
 
 // 移除 class 选择器
 Base.prototype.removeClass = function (className) {
     if (className instanceof Array) { // 集群
         for (var i = 0; i < className.length; i ++) {
             this.removeClass(className[i]);
         }
     } else { // 单一
         var node = null;
         for (var i = 0; i < this.elements.length; i ++) {
             node = this.elements[i];
             if (Base.hasClass(className, node)) {
                 node.className = node.className.replace(new RegExp('(^|\\s+)' + className + '(\\s+|$)'), ' ');
                 node.className = Base.trim(node.className);
             }
         }
     }
     return this;
 };
 
 // 添加样式规则
 Base.prototype.addRule = function (ruleName, ruleText, rulePosition, sheetIndex) {
     if (ruleName instanceof Array) { // 集群
         if (!(ruleText instanceof Array) || ruleName.length != ruleText.length) return this;
         for (var i = 0; i < ruleName.length; i ++) {
             if (ruleName[i] && ruleText[i]) this.addRule(ruleName[i], ruleText[i], rulePosition, sheetIndex);
         }
     } else { // 单一
         var rule = Base.checkRule(rulePosition, sheetIndex);
         if (typeof rule.sheet != 'undefined') {
             var nameTotal = Tool.ruleNameTotal(rule.sheet);
             for (var i = 0; i < nameTotal.length; i ++) {
                 if (nameTotal[i] == ruleName) return this;
             }
             Tool.addRule(rule.sheet, ruleName, ruleText, rule.position);
         }
     }
     return this;
 };
 
 // 移除样式规则
 Base.prototype.removeRule = function (rulePosition, ruleNumber, sheetIndex) {
     var rule = Base.checkRule(rulePosition, sheetIndex, ruleNumber);
     if (typeof rule.sheet != 'undefined') {
         for (var i = 0; i < rule.number; i ++) {
             Tool.removeRule(rule.sheet, rule.position);
         }
     }
     return this;
 };
 
 // 节点事件绑定
 Base.prototype.nodeEvent = function (eventName, method, mode) {
     if (typeof eventName != 'string' || typeof method != 'function') return this;
     eventName = eventName.toLowerCase();
     if (eventName.indexOf('on') == 0) eventName = eventName.substring(2, eventName.length);
     if (typeof mode == 'undefined') mode = true;
     for (var i = 0; i < this.elements.length; i ++) {
         switch (eventName) {
             case 'mousewheel' :
                 Tool.mousewheel(this.elements[i], method, mode);
                 break;
             default :
                 mode ? Tool.loginEvent(this.elements[i], eventName, method) : Tool.logoutEvent(this.elements[i], eventName, method);
         }
     }
     return this;
 };
 
 // HTML DOM 加载
 Base.prototype.htmlLoaded = function (method) {
     if (typeof method == 'function') Tool.htmlLoaded(method);
     return this;
 };
 
 // 加载特效插件
 Base.prototype.plugins = function (pluginName, pluginMethod) {
     if (pluginName instanceof Array) { // 集群
         if (!(pluginMethod instanceof Array) || pluginName.length != pluginMethod.length) return false;
         for (var i = 0; i < pluginName.length; i ++) {
             this.plugins(pluginName[i], pluginMethod[i]);
         }
     } else { // 单一
         if (typeof pluginName == 'string' && typeof pluginMethod == 'function') {
             Base.prototype[pluginName] = pluginMethod;
         }
     }
     return this;
 };
 
 /*
     库方法集合
 */
 // 库方法: 清除两边空格
 Base.trim = function (string) {
     if (typeof string != 'string') return string;
     var patternLeft = /^[\s\t　]+/;
     var patternRight = /[\s\t　]+$/;
     if (patternLeft.test(string)) string = string.replace(patternLeft, '');
     if (patternRight.test(string)) string = string.replace(patternRight, '');
     return string;
 };
 
 // 库方法: 检测样式规则
 Base.checkRule = function (rulePosition, sheetIndex, ruleNumber) {
     if (typeof rulePosition != 'number') rulePosition = 0;
     if (typeof sheetIndex != 'number') sheetIndex = 0;
     if (typeof ruleNumber != 'number') ruleNumber = 1;
     var sheetObject = undefined;
     var sheetTotal = document.styleSheets.length;
     if (sheetTotal != 0 && sheetIndex <= (sheetTotal - 1)) { // 兼容 IE 6/7/8 防止 unknown
         sheetObject = document.styleSheets[sheetIndex];
     }
     if (typeof sheetObject != 'undefined') {
         var ruleTotal = Tool.ruleTotal(sheetObject);
         if (rulePosition > ruleTotal) rulePosition = ruleTotal;
         var maxNumber = ruleTotal - rulePosition;
         if (ruleNumber > maxNumber) ruleNumber -= ruleNumber - maxNumber;
     }
     return {
         position : rulePosition,
         sheet : sheetObject,
         number : ruleNumber
     }
 };
 
 // 库方法: 检测 class
 Base.hasClass = function (className, elementNode) {
     return (new RegExp('(^|\\s+)' + className + '(\\s+|$)')).test(elementNode.className);
 }
 
 // 库方法: 元素节点定位器(局部搜索)
 Base.positioner = function (positioner) {
     if (typeof positioner != 'string') return false;
     var nodes = [];
     var patternId = /^id\s*=\s*([\w\-]+)$/i;
     var patternTag = /^tag(Name)?\s*=\s*([a-z]+)$/i;
     var patternClass = /^class(Name)?\s*=\s*([\w\-]+)$/i;
     if (patternTag.test(positioner)) { // tagName
         positioner = patternTag.exec(positioner)[2];
         nodes = $().getTagName(positioner).getNodes();
     } else if (patternClass.test(positioner)) { // class
         positioner = patternClass.exec(positioner)[2];
         nodes = $().getClass(positioner).getNodes();
     } else if (patternId.test(positioner)) { // id
         positioner = patternId.exec(positioner)[1];
         nodes = $().getId(positioner).getNodes();
     } else { // id
         nodes = $().getId(positioner).getNodes();
     }
     if (nodes == $().info) return false;
     return nodes;
 };
 
 // 库方法: 获取元素从属关系(直接从属)
 Base.hasChild = function (elementNode, targetNode) {
     var childs = targetNode.childNodes;
     for (var i = 0; i < childs.length; i ++) {
         if (childs[i].nodeType == 1 && childs[i] == elementNode) return true;
     }
     return false;
 };
 
 // 库方法: 清除空白节点
 Base.clear = function (elementNode) {
     var childs = elementNode.childNodes;
     var length = childs.length;
     for (var i = (length - 1); i >= 0; i --) {
         if (childs[i].nodeType == 3 && /^[\s\t　]+$/.test(childs[i].nodeValue)) elementNode.removeChild(childs[i]);
     }
     return elementNode;
 };
 
 // 库方法: 清除注释节点
 Base.comment = function (elementNode) {
     var childs = elementNode.childNodes;
     var length = childs.length;
     for (var i = (length - 1); i >= 0; i --) {
         if (childs[i].nodeType == 8) {
             elementNode.removeChild(childs[i]);
         }
     }
     return elementNode;
 };
 
 // 库方法: 字符串删减
 Base.replace = function (string, index) {
     if (typeof string != 'string') return string;
     if (string.indexOf(index) != -1) string = string.replace(new RegExp(index, 'ig'), '');
     return string;
 };
 
 // 库方法: 添加元素节点
 Base.addElement = function (elementName, attributes, html, targetNode) {
     var elementNode = document.createElement(elementName);
     if (typeof attributes == 'string' || attributes instanceof Array) this.addAttribute(attributes, elementNode);
     if (typeof html != 'undefined') $(elementNode).html(html);
     if (typeof targetNode != 'undefined') {
         if (!(typeof targetNode == 'object' || targetNode.nodeType == 1)) {
             if (!(targetNode = this.positioner(targetNode))) targetNode = document.body;
         }
     } else {
         targetNode = document.body;
     }
     if (targetNode instanceof Array) { // 集群
         for (var i = 0; i < targetNode.length; i ++) {
             targetNode[i].appendChild(elementNode.cloneNode(true));
         }
     } else { // 单一
         targetNode.appendChild(elementNode);
     }
     return elementNode;
 };
 
 // 库方法: 添加属性节点
 Base.addAttribute = function (attributes, elementNode) {
     if (attributes instanceof Array) { // 集群
         for (var i = 0; i < attributes.length; i ++) {
             this.addAttribute(attributes[i], elementNode);
         }
     } else { // 单一
         if (typeof attributes != 'string') return false;
         var patternAttribute = /^([a-z]+)[\s\t　]*=[\s\t　]*([\w,\(#=:\s\.\/\\\'\";\-\)]+)$/i;
         var key = '', value = '';
         if (patternAttribute.test(attributes)) {
             key = patternAttribute.exec(attributes)[1];
             value = patternAttribute.exec(attributes)[2];
             var patternClass = /^class(Name)?$/i, className = [];
             if (key == 'style') { // CSS
                 this.style(value, elementNode);
             } else if (patternClass.test(key)) { // class
                 this.addClass(value, elementNode);
             } else {
                 elementNode.setAttribute(key, value);
             }
         }
     }
 };
 
 // 库方法: CSS 处理
 Base.style = function (css, elementNode) {
     var split = /;[\s\t　]*/i;
     if (split.test(css)) { // 集群
         css = css.split(split);
         for (var i = 0; i < css.length; i ++) {
             this.style(css[i], elementNode);
         }
     } else { // 单一
         var patternCSS = /^([a-z]+)[\s\t　]*:[\s\t　]*([\w\(=\s\.,\/\\\'#\"\-\)]+)$/i, cssKey = '', cssValue = '';
         if (patternCSS.test(css)) {
             cssKey = patternCSS.exec(css)[1];
             cssValue = patternCSS.exec(css)[2];
             $(elementNode).css(cssKey, cssValue);
         }
     }
 };
 
 // 库方法: class 处理
 Base.addClass = function (className, elementNode) {
     var split = /[\s\t　]+/;
     if (split.test(className)) {
         className = className.split(split);
         for (var i = 0; i < className.length; i ++) {
             this.addClass(className[i], elementNode);
         }
     } else {
         $(elementNode).addClass(className);
     }
 };
 
 // 库方法: 移除元素节点
 Base.removeElement = function (elementNode, targetNode) {
     if (!(typeof elementNode == 'object' || elementNode.nodeType == 1)) {
         if (!(elementNode = this.positioner(elementNode))) return false;
     }
     if (typeof targetNode == 'undefined' || !(typeof targetNode == 'object' || targetNode.nodeType == 1)) {
         if (!(targetNode = this.positioner(targetNode))) targetNode = document.body;
     }
     if (targetNode instanceof Array) { // 集群
         for (var i = 0; i < targetNode.length; i ++) {
             this.removeElement(elementNode, targetNode[i]);
         }
     } else { // 单一
         if (elementNode instanceof Array) { // 集群
             for (var i = 0; i < elementNode.length; i ++) {
                 this.removeElement(elementNode[i], targetNode);
             }
         } else { // 单一
             if (this.hasChild(elementNode, targetNode)) targetNode.removeChild(elementNode);
         }
     }
 };
 
 // 库方法: 初始化滚动条
 Base.initializationScroll = function () {
     Tool.scrollLeft(0);
     Tool.scrollTop(0);
 };
 
 // 库方法: 设置与获取滚动条
 Base.scroll = function (x, y) {
     if (typeof x != 'number' && typeof y != 'number') { // 获取
         return {
             x : Tool.scrollLeft(),
             y : Tool.scrollTop()
         }
     }
     if (typeof x == 'number') { // 设置x轴
         Tool.scrollLeft(x);
     }
     if (typeof y == 'number') { // 设置y轴
         Tool.scrollTop(y);
     }
 };
 
 // 库方法: 获取网页可视区尺寸
 Base.getWindowRectangle = function () {
     return {
         width : Tool.getWindowWidth(),
         height : Tool.getWindowHeight()
     }
 };
 
 // 库方法: 获取元素尺寸
 Base.getInnerRectangle = function (elementNode) {
     var width = 0, height = 0, display = '', _this = null;
     _this = $(elementNode);
     display = _this.css('display');
     width = _this.css('width');
     height = _this.css('height');
     if (width == 'auto' || height == 'auto') { // IE 6/7/8
         if (display == 'none') _this.show();
         width = elementNode.offsetWidth;
         height = elementNode.offsetHeight;
     }
     width = this.replace(width, 'px');
     height = this.replace(height, 'px');
     return {
         width : width,
         height : height
     };
 };
 
 // 库方法: 获取元素外边距尺寸
 Base.getOuterRectangle = function (elementNode) {
     this.absolute(elementNode);
     var left = 0, top = 0, display = '', _this = null;
     _this = $(elementNode);
     display = _this.css('display');
     left = _this.css('left');
     top = _this.css('top');
     if (left == 'auto' || top == 'auto') { // IE 6/7/8
         if (display == 'none') _this.show();
         left = elementNode.offsetLeft;
         top = elementNode.offsetTop;
     }
     left = this.replace(left, 'px');
     top = this.replace(top, 'px');
     return {
         left : left,
         top : top
     };
 };
 
 // 库方法: 设置元素绝对定位
 Base.absolute = function (elementNode) {
     var _this = $(elementNode);
     if (_this.css('position') != 'absolute') _this.css(['position = absolute', 'left = 0', 'top = 0']);
 };
 
 // 库方法: 固定锁屏区域(修正浏览器Bug)
 Base.fixed = function () {
     // IE Bug 修正
     var down = function () {
         var move = function (event) {
             event.preventDefault();
         };
         var up = function () {
             $('#screen').nodeEvent('mousemove', move, false);
             $('#screen').nodeEvent('mouseup', up, false);
         };
         $('#screen').nodeEvent('mousemove', move);
         $('#screen').nodeEvent('mouseup', up);
     };
     $('#screen').nodeEvent('mousedown', down);
     // Chrome Bug 修改
     $('#screen').nodeEvent('mousewheel', function (event) {
         event.preventDefault();
     });
 };

 /*
     源码作者: 石不易(Louis Shi)
     联系方式: http://www.shibuyi.net
     ===================================================================================================
     程序名称: JavaScript 工具库(跨浏览器兼容) BETA 3.0 版
     迭代版本: BETA 2.0
     功能总数: 18 个
     新增总数: 2 个
     删除总数: 0 个
     追加功能:
         1. 新增“跨浏览器获取样式规则名称集合”
         2. 新增“跨浏览器 HTML DOM 加载”
     优化功能:
         1. 优化跨浏览器滚动条设置与获取至“scrollLeft”和“scrollTop”方法中
     删除功能:
         无
 */
 
 // 工具库
 var Tool = {
     // 数组排序
     sort : {
         minToMax : function (min, max) {
             if (min < max) {
                 return -1;
             } else if (min > max) {
                 return 1;
             } else {
                 return 0;
             }
         },
         maxToMin : function (min, max) {
             if (min < max) {
                 return 1;
             } else if (min > max) {
                 return -1;
             } else {
                 return 0;
             }
         }
     },
 
     // 跨浏览器获取计算后的样式
     getStyle : function (cssKey, elementNode) {
         if (typeof window.getComputedStyle != 'undefined') { // W3C
             return window.getComputedStyle(elementNode, null)[cssKey];
         } else if (typeof elementNode.currentStyle != 'undefined') { // IE 6/7/8
             return elementNode.currentStyle[cssKey];
         }
     },
 
     // 跨浏览器获取样式规则总数
     ruleTotal : function (sheetObject) {
         if (typeof sheetObject.cssRules != 'undefined') { // W3C
             return sheetObject.cssRules.length;
         } else if (typeof sheetObject.rules != 'undefined') { // IE 6/7/8
             return sheetObject.rules.length;
         }
     },
 
     // 跨浏览器获取样式规则名称集合
     ruleNameTotal : function (sheetObject) {
         var nameTotal = [];
         if (typeof sheetObject.cssRules != 'undefined') { // W3C
             for (var i = 0; i < sheetObject.cssRules.length; i ++) {
                 nameTotal.push(sheetObject.cssRules[i].selectorText);
             }
         } else if (typeof sheetObject.rules != 'undefined') { // IE 6/7/8
             for (var i = 0; i < sheetObject.rules.length; i ++) {
                 nameTotal.push(sheetObject.rules[i].selectorText);
             }
         }
         return nameTotal;
     },
 
     // 跨浏览器添加样式规则
     addRule : function (sheetObject, ruleName, ruleText, rulePosition) {
         if (typeof sheetObject.insertRule != 'undefined') { // W3C
             sheetObject.insertRule(ruleName + ' {' + ruleText + '}', rulePosition);
         } else if (typeof sheetObject.addRule != 'undefined') { // IE 6/7/8
             sheetObject.addRule(ruleName, ruleText, rulePosition);
         }
     },
 
     // 跨浏览器移除样式规则
     removeRule : function (sheetObject, rulePosition) {
         if (typeof sheetObject.deleteRule != 'undefined') { // W3C
             sheetObject.deleteRule(rulePosition);
         } else if (typeof sheetObject.removeRule != 'undefined') { // IE 6/7/8
             sheetObject.removeRule(rulePosition);
         }
     },
 
     // IE 6/7/8 事件对象匹配模式
     eventMatch : function (event) {
         event.target = event.srcElement;
         event.stopPropagation = function () {
             event.cancelBubble = true;
         };
         event.preventDefault = function () {
             event.returnValue = false;
         };
         return event;
     },
 
     // 事件绑定唯一标识符
     eventId : 0,
 
     // 跨浏览器现代事件绑定: 注册事件
     loginEvent : function (elementNode, eventName, method) {
         if (typeof elementNode.addEventListener != 'undefined') { // W3C
             elementNode.addEventListener(eventName, method, false);
         } else if (typeof elementNode.attachEvent != 'undefined') { // IE 6/7/8
             if (typeof elementNode.hashTable != 'object') elementNode.hashTable = {};
             if (typeof elementNode.hashTable[eventName] != 'object') elementNode.hashTable[eventName] = [];
             var events = elementNode.hashTable[eventName];
             for (var i = 0; i < events.length; i ++) {
                 if (events[i] == method) return false;
             }
             events[this.eventId ++] = method;
             var _this = this;
             elementNode['on' + eventName] = function () {
                 var event = _this.eventMatch(window.event);
                 for (var i = 0; i < events.length; i ++) {
                     if (typeof events[i] == 'function') events[i].call(this, event);
                 }
             };
         }
     },
 
     // 跨浏览器现代事件绑定: 注销事件
     logoutEvent : function (elementNode, eventName, method) {
         if (typeof elementNode.removeEventListener != 'undefined') { // W3C
             elementNode.removeEventListener(eventName, method, false);
         } else if (typeof elementNode.detachEvent != 'undefined') { // IE 6/7/8
             if (typeof elementNode.hashTable == 'object' && typeof elementNode.hashTable[eventName] == 'object') {
                 var events = elementNode.hashTable[eventName];
                 for (var i = 0; i < events.length; i ++) {
                     if (events[i] == method) delete events[i];
                 }
             }
         }
     },
 
     // 跨浏览器鼠标滚轮事件
     mousewheel : function (elementNode, method, mode) {
         if (elementNode == window) elementNode = document; // IE 6/7/8
         if (typeof elementNode.onmousewheel != 'undefined') { // Not Firefox
             mode ? this.loginEvent(elementNode, 'mousewheel', method) : this.logoutEvent(elementNode, 'mousewheel', method);
         } else { // Firefox
             mode ? this.loginEvent(elementNode, 'DOMMouseScroll', method) : this.logoutEvent(elementNode, 'DOMMouseScroll', method);
         }
     },
 
     // 跨浏览器 HTML DOM 加载
     htmlLoaded : function (method) {
         if ((browserDetect.opera && browserDetect.browser.version < 9)
         ||
             (browserDetect.firefox && browserDetect.browser.version < 3)
         ||
             (browserDetect.engine.name == 'WebKit' && browserDetect.engine.version < 525)) { // low version W3C
             var timer = setTimeout(function () {
                 clearTimeout(timer);
                 /interactive|loading|complete/i.test(document.readyState) ? method() : timer = setTimeout(arguments.callee, 1);
             }, 1);
         } else if (!browserDetect.ie || browserDetect.browser.version > 8) { // current W3C
             var _this = this;
             this.loginEvent(document, 'DOMContentLoaded', function () {
                 _this.logoutEvent(document, 'DOMContentLoaded', arguments.callee);
                 method();
             });
         } else if (browserDetect.ie && browserDetect.browser.version < 9) { // IE 6/7/8
             var timer = setTimeout(function () {
                 try {
                     clearTimeout(timer);
                     document.documentElement.doScroll('top');
                     method();
                 } catch (error) {
                     timer = setTimeout(arguments.callee, 1);
                 }
             }, 1);
         }
     },
 
     // 跨浏览器获取元素从属关系(间接从属+直接从属)
     getContains : function (elementNode, targetNode) {
         if (typeof targetNode.compareDocumentPosition != 'undefined') { // W3C
             return targetNode.compareDocumentPosition(elementNode) == 20;
         } else if (typeof targetNode.contains != 'undefined') { // IE 6/7/8
             return targetNode.contains(elementNode);
         }
     },
 
     // 跨浏览器获取与设置滚动条x轴
     scrollLeft : function (x) {
         if (browserDetect.engine.name == 'WebKit') { // Chrome / Safari
             if (typeof x != 'undefined') { // 设置
                 document.body.scrollLeft = x;
             } else { // 获取
                 return document.body.scrollLeft;
             }
         } else { // Not Chrome / Safari
             if (typeof x != 'undefined') { // 设置
                 document.documentElement.scrollLeft = x;
             } else { // 获取
                 return document.documentElement.scrollLeft;
             }
         }
     },
 
     // 跨浏览器获取与控制滚动条y轴
     scrollTop : function (y) {
         if (browserDetect.engine.name == 'WebKit') { // Chrome / Safari
             if (typeof y != 'undefined') { // 设置
                 document.body.scrollTop = y;
             } else { // 获取
                 return document.body.scrollTop;
             }
         } else { // Not Chrome / Safari
             if (typeof y != 'undefined') { // 设置
                 document.documentElement.scrollTop = y;
             } else { // 获取
                 return document.documentElement.scrollTop;
             }
         }
     },
 
     // 跨浏览器获取网页x轴可视区域尺寸
     getWindowWidth : function () {
         if (typeof window.innerWidth != 'undefined') { // W3C
             return window.innerWidth;
         } else if (typeof document.documentElement.clientWidth != 'undefined') { // IE 6/7/8
             return document.documentElement.clientWidth;
         }
     },
 
     // 跨浏览器获取网页y轴可视区域尺寸
     getWindowHeight : function () {
         if (typeof window.innerHeight != 'undefined') { // W3C
             return window.innerHeight;
         } else if (typeof document.documentElement.clientHeight) { // IE 6/7/8
             return document.documentElement.clientHeight;
         }
     },
 
     // IE 专属: 浏览器外捕获鼠标按下
     setCaptureIE : function (elementNode) {
         if (typeof elementNode.setCapture != 'undefined') { // IE
             elementNode.setCapture();
         }
     },
 
     // IE 专属: 浏览器外捕获鼠标弹起
     releaseCaptureIE : function (elementNode) {
         if (typeof elementNode.releaseCapture != 'undefined') { // IE
             elementNode.releaseCapture();
         }
     }
 
 };

 /*
     源码作者: 石不易(Louis Shi)
     联系方式: http://www.shibuyi.net
     ===================================================================================================
     程序名称: 浏览器嗅探器 BETA 3.0
     版本迭代: 无
     功能总数: 4 个
     功能介绍:
         1. 支持浏览器品牌嗅探
         2. 支持浏览器名称/版本嗅探
         3. 支持浏览器引擎名称/版本嗅探
         4. 支持浏览器隶属平台名称/版本嗅探
 */
 (function () {
     window.browserDetect = {
         ie : false,
         firefox : false,
         chrome : false,
         safari : false,
         opera : false,
         other : false,

         browser : {
             name : '',
             version : ''
         },
         engine : {
             name : '',
             version : ''
         },
         system : {
             name : '',
             version : ''
         }
     };

     var info = navigator.userAgent;
     var system = navigator.platform;

     /*
         Browser pattern
     */
     // check IE
     var patternIE = /MSIE\s([\d\.]+)/i;
     var patternHighIE = /rv:([\d\.]+)/i;
     // check Firefox
     var patternFirefox = /Firefox\/([\d\.]+)/i;
     // check Chrome
     var patternChrome = /Chrome\/([\d\.]+)/i;
     // check Safari
     var patternSafari = /Safari\/([\d\.]+)/i;
     // check Opera
     var patternOpera = /Opera\/([\d\.]+)/i;

     /*
         Engine pattern
     */
     // check Trident
     var patternTrident = /Trident\/([\d\.]+)/i;
     // check Gecko
     var patternGecko = /Gecko\/(\d+)/i;
     // check WebKit
     var patternWebKit = /AppleWebKit\/([\d\.]+)/i;
     // check Presto
     var patternPresto = /Presto\/([\d\.]+)/i;

     /*
         System pattern
     */
     // check Windows
     var patternWindows = /Windows\sNT\s([\d\.]+)/i;
     var patternWin = /Win/i;
     // check Linux
     var patternLinux = /Linux/i;
     // check Unix
     var patternUnix = /X11/i;
     // check Mac
     var patternMac = /Mac/i;

     /*
         Check browser
     */
     if ((low = patternIE.test(info)) || (high = patternTrident.test(info))) { // IE
         browserDetect.ie = true;
         browserDetect.browser.name = 'Internet Explorer';
         browserDetect.engine.name = 'Trident';
         if (low) { // IE 6 - 10
             browserDetect.browser.version = parseFloat(patternIE.exec(info)[1]);
         } else if (high) { // IE 11+
             browserDetect.browser.version = parseFloat(patternHighIE.exec(info)[1]);
         }
         if (browserDetect.browser.version >= 6.0) {
             switch (browserDetect.browser.version) { // engine version
                 case 6.0 :
                     browserDetect.engine.version = 2.0;
                     break;
                 case 7.0 :
                     browserDetect.engine.version = 3.0;
                     break;
                 default :
                     browserDetect.engine.version = parseFloat(patternTrident.exec(info)[1]);
             }
         } else {
             browserDetect.engine.version = '2.0-';
         }
     } else if (patternFirefox.test(info)) { // Firefox
         browserDetect.firefox = true;
         browserDetect.browser.name = 'Firefox';
         browserDetect.browser.version = parseFloat(patternFirefox.exec(info)[1]);
     } else if (patternChrome.test(info)) { // Chrome
         browserDetect.chrome = true;
         browserDetect.browser.name = 'Chrome';
         browserDetect.browser.version = parseFloat(patternChrome.exec(info)[1]);
     } else if (patternSafari.test(info)) { // Safari
         browserDetect.safari = true;
         browserDetect.browser.name = 'Safari';
         var patternVersion = /Version\/([\d\.]+)/i;
         if (patternVersion.test(info)) { // high version
             browserDetect.browser.version = parseFloat(patternVersion.exec(info)[1]);
         } else { // low version
             browserDetect.browser.version = parseFloat(patternSafari.exec(info)[1]);
         }
     } else if (patternOpera.test(info)) { // Opera
         browserDetect.opera = true;
         browserDetect.browser.name = 'Opera';
         var patternVersion = /Version\/([\d\.]+)/i;
         if (patternVersion.test(info)) { // high version
             browserDetect.browser.version = parseFloat(patternVersion.exec(info)[1]);
         } else { // low version
             browserDetect.browser.version = parseFloat(patternOpera.exec(info)[1]);
         }
     } else { // Other
         browserDetect.other = true;
         browserDetect.browser.name = 'Other';
         browserDetect.browser.version = 'Unknown';
     }

     /*
         Check Engine
     */
     if (patternTrident.test(info)) { // Trident
         browserDetect.engine.name = 'Trident';
         browserDetect.engine.version = parseFloat(patternTrident.exec(info)[1]);
     } else if (patternGecko.test(info)) { // Gecko
         browserDetect.engine.name = 'Gecko';
         var patternVersion = /rv:([\d\.]+)/i;
         if (patternVersion.test(info)) { // high version
             browserDetect.engine.version = parseFloat(patternVersion.exec(info)[1]);
         } else { // low version
             browserDetect.engine.version = parseFloat(patternGecko.exec(info)[1]);
         }
     } else if (patternWebKit.test(info)) { // WebKit
         browserDetect.engine.name = 'WebKit';
         browserDetect.engine.version = parseFloat(patternWebKit.exec(info)[1]);
     } else if (patternPresto.test(info)) { // Presto
         browserDetect.engine.name = 'Presto';
         browserDetect.engine.version = parseFloat(patternPresto.exec(info)[1]);
     } else { // Other
         if (browserDetect.other) {
             browserDetect.engine.name = 'Other';
             browserDetect.engine.version = 'Unknown';
         }
     }

     /*
         Check System
     */
     if (patternWindows.test(info)) { // Windows
         browserDetect.system.version = parseFloat(patternWindows.exec(info)[1]);
         switch (browserDetect.system.version) {
             case 5.0 :
                 browserDetect.system.name = 'Windows 2000';
                 break;
             case 5.1 :
                 browserDetect.system.name = 'Windows XP';
                 break;
             case 5.2 :
                 browserDetect.system.name = 'Windows Server 2003 / Windows Server 2003 R2';
                 break;
             case 6.0 :
                 browserDetect.system.name = 'Windows Vista / Windows Server 2008';
                 break;
             case 6.1 :
                 browserDetect.system.name = 'Windows 7 / Windows Server 2008 R2';
                 break;
             case 6.2 :
                 browserDetect.system.name = 'Windows 8 / Windows Server 2012 / Windows Phone 8';
                 break
             case 6.3 :
                 browserDetect.system.name = 'Windows 8.1 / Windows Server 2012 R2';
                 break;
             default :
                 browserDetect.system.name = 'Windows';
         }
     } else if (patternWin.test(system)) { // Windows(low version browser)
         browserDetect.system.name = 'Windows';
         browserDetect.system.version = 'Unknown';
     } else if (patternLinux.test(system)) { // Linux
         browserDetect.system.name = 'Linux';
         browserDetect.system.version = 'Unknown';
     } else if (patternUnix.test(system)) { // Unix
         browserDetect.system.name = 'Unix';
         browserDetect.system.version = 'Unknown';
     } else if (patternMac.test(system)) { // Mac
         browserDetect.system.name = 'Mac';
         browserDetect.system.version = 'Unknown';
     } else { // Other
         browserDetect.system.name = 'Other';
         browserDetect.system.version = 'Unknown';
     }

 })();

 /*
     源码作者: 石不易(Louis Shi)
     联系方式: http://www.shibuyi.net
     ===================================================================================================
     特效插件: 元素隐藏
     特效插件: 元素显示
     特效插件: 鼠标移入移出(下拉菜单)
 */
 $().plugins(['hide', 'show', 'hover'], [function () {
     this.css('display', 'none');
     return this;
 }, function () {
     this.css('display', 'block');
     return this;
 }, function (overMethod, outMethod) {
     this.nodeEvent('mouseover', overMethod);
     this.nodeEvent('mouseout', outMethod);
     return this;
 }]);

 /*
     源码作者: 石不易(Louis Shi)
     联系方式: http://www.shibuyi.net
     ===================================================================================================
     特效插件: 元素居中
 */
 $().plugins('center', function () {
     var windowRectangle = Base.getWindowRectangle();
     var scroll = Base.scroll();
     var innerRectangle = null, x = 0, y = 0;
     for (var i = 0; i < this.elements.length; i ++) {
         Base.absolute(this.elements[i]);
         innerRectangle = Base.getInnerRectangle(this.elements[i]);
         x = (windowRectangle.width - innerRectangle.width) / 2;
         y = (windowRectangle.height - innerRectangle.height) / 2;
         if (x < 0) x = 0;
         if (y < 0) y = 0;
         $(this.elements[i]).css(['left = ' + (x + scroll.x) + 'px', 'top = ' + (y + scroll.y) + 'px']);
     }
     return this;
 });

 /*
     源码作者: 石不易(Louis Shi)
     联系方式: http://www.shibuyi.net
     ===================================================================================================
     特效插件: 遮罩锁屏
     特效插件: 清除遮罩
 */
 $().plugins(['lock', 'unlock'], [function () {
     var screen = null;
     if ((screen = $('#screen').firstNode()) != this.info) {
         if (Base.trim($(Base.comment(screen)).html()) != '') {
             Base.removeElement(screen);
             screen = Base.addElement('div', 'id = screen');
         }
     } else {
         screen = Base.addElement('div', 'id = screen');
     }
     var scroll = Base.scroll();
     $('html').css('overflow', 'hidden');
     Base.scroll(scroll.x, scroll.y);
     var windowRectangle = Base.getWindowRectangle();
     Base.absolute(screen);
     $(screen).css([
                                 'width = ' + windowRectangle.width + 'px',
                                 'height = ' + windowRectangle.height + 'px',
                                 'left = ' + scroll.x + 'px',
                                 'top = ' + scroll.y + 'px',
                                 'backgroundColor = black',
                                 'zIndex = 9998',
                                 'opacity = 0.4', // W3C
                                 'filter = alpha(opacity = 40)' // IE 6/7/8
                             ]).show();
     Base.fixed(); // 修正 Bug
     return this;
 }, function () {
     var screen = null;
     if ((screen = $('#screen').firstNode()) == this.info) return this;
     var scroll = Base.scroll();
     $('html').css('overflow', 'auto');
     Base.scroll(scroll.x, scroll.y);
     $(screen).hide();
     return this;
 }]);

 /*
     源码作者: 石不易(Louis Shi)
     联系方式: http://www.shibuyi.net
     ===================================================================================================
     特效插件: 元素拖拽
 */
 $().plugins('drag', function () {
     var selector = null, childs = [];
     for (var j = 0; j < this.elements.length; j ++) {
         if (arguments.length != 0) {
             for (var i = 0; i < arguments.length; i ++) {
                 if ((selector = $(this.elements[j]).selector(arguments[i]).getNodes()) == this.info) continue;
                 childs.push(selector);
             }
         }
         if (childs.length == 0) childs.push(this.elements[j]);
         var targetNode = this.elements[j];
         Base.absolute(targetNode);
         var down = function (event) {
             var scroll = Base.scroll();
             var outerRectangle = Base.getOuterRectangle(targetNode);
             var fixedX = (event.clientX + scroll.x) - outerRectangle.left;
             var fixedY = (event.clientY + scroll.y) - outerRectangle.top;
             var windowRectangle = Base.getWindowRectangle();
             var innerRectangle = Base.getInnerRectangle(targetNode);
             Tool.setCaptureIE(targetNode); // 兼容 IE Bug
             var move = function (event) {
                 var x = (event.clientX + scroll.x) - fixedX;
                 var y = (event.clientY + scroll.y) - fixedY;
                 var minX = scroll.x, minY = scroll.y, maxX = 0, maxY = 0;
                 maxX = (windowRectangle.width + scroll.x) - innerRectangle.width;
                 maxY = (windowRectangle.height + scroll.y) - innerRectangle.height;
                 if (x < minX) x = minX; else if (x > maxX) x = maxX;
                 if (y < minY) y = minY; else if (y > maxY) y = maxY;
                 $(targetNode).css(['left = ' + x + 'px', 'top = ' + y + 'px']);
             };
             var up = function () {
                 Tool.releaseCaptureIE(targetNode); // 兼容 IE Bug
                 $(document).nodeEvent('mousemove', move, false);
                 $(document).nodeEvent('mouseup', up, false);
             };
             $(document).nodeEvent('mousemove', move);
             $(document).nodeEvent('mouseup', up);
         };
         for (var k = 0; k < childs.length; k ++) {
             if (childs[k] instanceof Array) { // 集群
                 for (var l = 0; l < childs[k].length; l ++) {
                     $(childs[k][l]).nodeEvent('mousedown', down);
                 }
             } else { // 单一
                 $(childs[k]).nodeEvent('mousedown', down);
             }
         }
     }
     return this;
 });

 /*
     源码作者: 石不易(Louis Shi)
     联系方式: http://www.shibuyi.net
     ===================================================================================================
     特效插件: 禁止元素溢出可视区
 */
 $().plugins('overflow', function () {
     var windowRectangle = Base.getWindowRectangle();
     var scroll = Base.scroll();
     var minX = scroll.x, minY = scroll.y, maxX = 0, maxY = 0, x = 0, y = 0;
     var innerRectangle = null, outerRectangle = null;
     for (var i = 0; i < this.elements.length; i ++) {
         Base.absolute(this.elements[i]);
         innerRectangle = Base.getInnerRectangle(this.elements[i]);
         outerRectangle = Base.getOuterRectangle(this.elements[i]);
         x = outerRectangle.left;
         y = outerRectangle.top;
         maxX = (windowRectangle.width + scroll.x) - innerRectangle.width;
         maxY = (windowRectangle.height + scroll.y) - innerRectangle.height;
         if (x < minX) x = minX; else if (x > maxX) x = maxX;
         if (y < minY) y = minY; else if (y > maxY) y = maxY;
         $(this.elements[i]).css(['left = ' + x + 'px', 'top = ' + y + 'px']);
     }
     return this;
 });

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