封装cookie.js、EventUtil.js、

最近学习了javascript，封装好的东西看起来舒服，以备需要的时候拉出来，jquery对javascript做了很好的封装！以后会多用jquery多些

var CookieUtil = {

    get: function (name){
        var cookieName = encodeURIComponent(name) + "=",
            cookieStart = document.cookie.indexOf(cookieName),
            cookieValue = null,
            cookieEnd;

        if (cookieStart > -1){
            cookieEnd = document.cookie.indexOf(";", cookieStart);
            if (cookieEnd == -1){
                cookieEnd = document.cookie.length;
            }
            cookieValue = decodeURIComponent(document.cookie.substring(cookieStart + cookieName.length, cookieEnd));
        } 

        return cookieValue;
    },

    set: function (name, value, expires, path, domain, secure) {
        var cookieText = encodeURIComponent(name) + "=" + encodeURIComponent(value);

        if (expires instanceof Date) {
            cookieText += "; expires=" + expires.toGMTString();
        }

        if (path) {
            cookieText += "; path=" + path;
        }

        if (domain) {
            cookieText += "; domain=" + domain;
        }

        if (secure) {
            cookieText += "; secure";
        }

        document.cookie = cookieText;
    },

    unset: function (name, path, domain, secure){
        this.set(name, "", new Date(0), path, domain, secure);
    }

};

/*SubCookieUtil.js*/
var SubCookieUtil = {

    get: function (name, subName){
        var subCookies = this.getAll(name);
        if (subCookies){
            return subCookies[subName];
        } else {
            return null;
        }
    },
    
    getAll: function(name){
        var cookieName = encodeURIComponent(name) + "=",
            cookieStart = document.cookie.indexOf(cookieName),
            cookieValue = null,
            cookieEnd,
            subCookies,
            i,
            parts,
            result = {};
            
        if (cookieStart > -1){
            cookieEnd = document.cookie.indexOf(";", cookieStart)
            if (cookieEnd == -1){
                cookieEnd = document.cookie.length;
            }
            cookieValue = document.cookie.substring(cookieStart + cookieName.length, cookieEnd);
            
            if (cookieValue.length > 0){
                subCookies = cookieValue.split("&");
                
                for (i=0, len=subCookies.length; i < len; i++){
                    parts = subCookies[i].split("=");
                    result[decodeURIComponent(parts[0])] = decodeURIComponent(parts[1]);
                }
    
                return result;
            }  
        } 

        return null;
    },
    
    set: function (name, subName, value, expires, path, domain, secure) {
    
        var subcookies = this.getAll(name) || {};
        subcookies[subName] = value;
        this.setAll(name, subcookies, expires, path, domain, secure);

    },
    
    setAll: function(name, subcookies, expires, path, domain, secure){
    
        var cookieText = encodeURIComponent(name) + "=",
            subcookieParts = new Array(),
            subName;
        
        for (subName in subcookies){
            if (subName.length > 0 && subcookies.hasOwnProperty(subName)){
                subcookieParts.push(encodeURIComponent(subName) + "=" + encodeURIComponent(subcookies[subName]));
            }
        }
        
        if (subcookieParts.length > 0){
            cookieText += subcookieParts.join("&");
                
            if (expires instanceof Date) {
                cookieText += "; expires=" + expires.toGMTString();
            }
        
            if (path) {
                cookieText += "; path=" + path;
            }
        
            if (domain) {
                cookieText += "; domain=" + domain;
            }
        
            if (secure) {
                cookieText += "; secure";
            }
        } else {
            cookieText += "; expires=" + (new Date(0)).toGMTString();
        }
    
        document.cookie = cookieText;        
    
    },
    
    unset: function (name, subName, path, domain, secure){
        var subcookies = this.getAll(name);
        if (subcookies){
            delete subcookies[subName];
            this.setAll(name, subcookies, null, path, domain, secure);
        }
    },
    
    unsetAll: function(name, path, domain, secure){
        this.setAll(name, null, new Date(0), path, domain, secure);
    }

};

var EventUtil = {

    addHandler: function(element, type, handler){
        if (element.addEventListener){
            element.addEventListener(type, handler, false);
        } else if (element.attachEvent){
            element.attachEvent("on" + type, handler);
        } else {
            element["on" + type] = handler;
        }
    },

    getButton: function(event){
        if (document.implementation.hasFeature("MouseEvents", "2.0")){
            return event.button;
        } else {
            switch(event.button){
                case 0:
                case 1:
                case 3:
                case 5:
                case 7:
                    return 0;
                case 2:
                case 6:
                    return 2;
                case 4: return 1;
            }
        }
    },

    getCharCode: function(event){
        if (typeof event.charCode == "number"){
            return event.charCode;
        } else {
            return event.keyCode;
        }
    },

    getClipboardText: function(event){
        var clipboardData =  (event.clipboardData || window.clipboardData);
        return clipboardData.getData("text");
    },

    getEvent: function(event){
        return event ? event : window.event;
    },

    getRelatedTarget: function(event){
        if (event.relatedTarget){
            return event.relatedTarget;
        } else if (event.toElement){
            return event.toElement;
        } else if (event.fromElement){
            return event.fromElement;
        } else {
            return null;
        }

    },

    getTarget: function(event){
        return event.target || event.srcElement;
    },

    getWheelDelta: function(event){
        if (event.wheelDelta){
            return (client.engine.opera && client.engine.opera < 9.5 ? -event.wheelDelta : event.wheelDelta);
        } else {
            return -event.detail * 40;
        }
    },

    preventDefault: function(event){
        if (event.preventDefault){
            event.preventDefault();
        } else {
            event.returnValue = false;
        }
    },

    removeHandler: function(element, type, handler){
        if (element.removeEventListener){
            element.removeEventListener(type, handler, false);
        } else if (element.detachEvent){
            element.detachEvent("on" + type, handler);
        } else {
            element["on" + type] = null;
        }
    },

    setClipboardText: function(event, value){
        if (event.clipboardData){
            event.clipboardData.setData("text/plain", value);
        } else if (window.clipboardData){
            window.clipboardData.setData("text", value);
        }
    },

    stopPropagation: function(event){
        if (event.stopPropagation){
            event.stopPropagation();
        } else {
            event.cancelBubble = true;
        }
    }

};

var client = function(){

    //rendering engines
    var engine = {
        ie: 0,
        gecko: 0,
        webkit: 0,
        khtml: 0,
        opera: 0,

        //complete version
        ver: null
    };

    //browsers
    var browser = {

        //browsers
        ie: 0,
        firefox: 0,
        safari: 0,
        konq: 0,
        opera: 0,
        chrome: 0,

        //specific version
        ver: null
    };

    //platform/device/OS
    var system = {
        win: false,
        mac: false,
        x11: false,

        //mobile devices
        iphone: false,
        ipod: false,
        ipad: false,
        ios: false,
        android: false,
        nokiaN: false,
        winMobile: false,

        //game systems
        wii: false,
        ps: false
    };    

    //detect rendering engines/browsers
    var ua = "Mozilla/4.0 (compatible; MSIE 7.0; Windows Phone OS 7.0; Trident/3.1; IEMobile/7.0) Asus;Galaxy6";//navigator.userAgent;
    if (window.opera){
        engine.ver = browser.ver = window.opera.version();
        engine.opera = browser.opera = parseFloat(engine.ver);
    } else if (/AppleWebKit\/(\S+)/.test(ua)){
        engine.ver = RegExp["$1"];
        engine.webkit = parseFloat(engine.ver);

        //figure out if it's Chrome or Safari
        if (/Chrome\/(\S+)/.test(ua)){
            browser.ver = RegExp["$1"];
            browser.chrome = parseFloat(browser.ver);
        } else if (/Version\/(\S+)/.test(ua)){
            browser.ver = RegExp["$1"];
            browser.safari = parseFloat(browser.ver);
        } else {
            //approximate version
            var safariVersion = 1;
            if (engine.webkit < 100){
                safariVersion = 1;
            } else if (engine.webkit < 312){
                safariVersion = 1.2;
            } else if (engine.webkit < 412){
                safariVersion = 1.3;
            } else {
                safariVersion = 2;
            }   

            browser.safari = browser.ver = safariVersion;
        }
    } else if (/KHTML\/(\S+)/.test(ua) || /Konqueror\/([^;]+)/.test(ua)){
        engine.ver = browser.ver = RegExp["$1"];
        engine.khtml = browser.konq = parseFloat(engine.ver);
    } else if (/rv:([^\)]+)\) Gecko\/\d{8}/.test(ua)){
        engine.ver = RegExp["$1"];
        engine.gecko = parseFloat(engine.ver);

        //determine if it's Firefox
        if (/Firefox\/(\S+)/.test(ua)){
            browser.ver = RegExp["$1"];
            browser.firefox = parseFloat(browser.ver);
        }
    } else if (/MSIE ([^;]+)/.test(ua)){
        engine.ver = browser.ver = RegExp["$1"];
        engine.ie = browser.ie = parseFloat(engine.ver);
    }

    //detect browsers
    browser.ie = engine.ie;
    browser.opera = engine.opera;

    //detect platform
    var p = navigator.platform;
    system.win = p.indexOf("Win") == 0;
    system.mac = p.indexOf("Mac") == 0;
    system.x11 = (p == "X11") || (p.indexOf("Linux") == 0);

    //detect windows operating systems
    if (system.win){
        if (/Win(?:dows )?([^do]{2})\s?(\d+\.\d+)?/.test(ua)){
            if (RegExp["$1"] == "NT"){
                switch(RegExp["$2"]){
                    case "5.0":
                        system.win = "2000";
                        break;
                    case "5.1":
                        system.win = "XP";
                        break;
                    case "6.0":
                        system.win = "Vista";
                        break;
                    case "6.1":
                        system.win = "7";
                        break;
                    default:
                        system.win = "NT";
                        break;
                }
            } else if (RegExp["$1"] == "9x"){
                system.win = "ME";
            } else {
                system.win = RegExp["$1"];
            }
        }
    }

    //mobile devices
    system.iphone = ua.indexOf("iPhone") > -1;
    system.ipod = ua.indexOf("iPod") > -1;
    system.ipad = ua.indexOf("iPad") > -1;
    system.nokiaN = ua.indexOf("NokiaN") > -1;

    //windows mobile
    if (system.win == "CE"){
        system.winMobile = system.win;
    } else if (system.win == "Ph"){
        if(/Windows Phone OS (\d+.\d+)/.test(ua)){;
            system.win = "Phone";
            system.winMobile = parseFloat(RegExp["$1"]);
        }
    }

    //determine iOS version
    if (system.mac && ua.indexOf("Mobile") > -1){
        if (/CPU (?:iPhone )?OS (\d+_\d+)/.test(ua)){
            system.ios = parseFloat(RegExp.$1.replace("_", "."));
        } else {
            system.ios = 2;  //can't really detect - so guess
        }
    }

    //determine Android version
    if (/Android (\d+\.\d+)/.test(ua)){
        system.android = parseFloat(RegExp.$1);
    }

    //gaming systems
    system.wii = ua.indexOf("Wii") > -1;
    system.ps = /playstation/i.test(ua);

    //return it
    return {
        engine:     engine,
        browser:    browser,
        system:     system
    };

}();

//跨浏览器添加事件 
function addEvent(obj, type, fn) {
    if (obj.addEventListener) {
        obj.addEventListener(type, fn, false);
    } else if (obj.attachEvent) {
        obj.attachEvent('on' + type, function () {
            fn.call(obj);
        });
    }
}

//跨浏览器移除事件
function removeEvent(obj, type, fn) {
    if (obj.removeEventListener) {
        obj.removeEventListener(type, fn, false);
    } else if (obj.detachEvent) {
        obj.detachEvent('on' + type, fn);
    }
}

//跨浏览器阻止默认行为
function preDef(evt) {
    var e = evt || window.event;
    if (e.preventDefault) {
        e.preventDefault();
    } else {
        e.returnValue = false;
    }
}

//跨浏览器获取目标对象
function getTarget(evt) {
    if (evt.target) {        //W3C
        return evt.target;
    } else if (window.event.srcElement) {        //IE
        return window.event.srcElement;
    }
}

//跨浏览器获取字符编码
function getCharCode(evt) {
    var e = evt || window.event;
    if (typeof e.charCode == 'number') {
        return e.charCode;
    } else {
        return e.keyCode;
    }
}

function createXHR() {
    if (typeof XMLHttpRequest != 'undefined') {
        return new XMLHttpRequest();
    } else if (typeof ActiveXObject != 'undefined') {
        var version = [
                                    'MSXML2.XMLHttp.6.0',
                                    'MSXML2.XMLHttp.3.0',
                                    'MSXML2.XMLHttp'
        ];
        for (var i = 0; version.length; i ++) {
            try {
                return new ActiveXObject(version[i]);
            } catch (e) {
                //跳过
            }    
        }
    } else {
        throw new Error('您的系统或浏览器不支持XHR对象！');
    }
}

//名值对转换为字符串
function params(data) {
    var arr = [];
    for (var i in data) {
        arr.push(encodeURIComponent(i) + '=' + encodeURIComponent(data[i]));
    }
    return arr.join('&');
}

//封装ajax
function ajax(obj) {
    var xhr = createXHR();
    obj.url = obj.url + '?rand=' + Math.random();
    obj.data = params(obj.data);
    if (obj.method === 'get') obj.url += obj.url.indexOf('?') == -1 ? '?' + obj.data : '&' + obj.data;
    if (obj.async === true) {
        xhr.onreadystatechange = function () {
            if (xhr.readyState == 4) {
                callback();
            }
        };
    }
    xhr.open(obj.method, obj.url, obj.async);
    if (obj.method === 'post') {
        xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        xhr.send(obj.data);
    } else {
        xhr.send(null);
    }
    if (obj.async === false) {
        callback();
    }
    function callback() {
        if (xhr.status == 200) {
            obj.success(xhr.responseText);            //回调传递参数
        } else {
            alert('获取数据错误！错误代号：' + xhr.status + '，错误信息：' + xhr.statusText);
        }
    }
}

//调用ajax
addEvent(document, 'click', function () {
    ajax({
        method : 'post',
        url : 'demo3.php',
        data : {
            'name' : 'Lee',
            'age' : 100
        },
        success : function (text) {
            alert(text);
        },
        async : true
    });
});