/*** @author wsf*/var jCookies = (function (){var instance;//对象引用var methods = {/*** 设置cookie*/setCookie : function (cName,cValue,cExpir){if(cName){var d = new Date();if(cExpir)d.setTime(getNowDateTime()+getSpecificDate(cExpir));elsed = this.expirDate;this.doc.cookie = cName + "="+ escape (cValue) + ";expires=" + d.toGMTString();}},/*** 获得指定cookei*/getCookie : function (cName){var arr,reg=new RegExp("(^| )"+cName+"=([^;]*)(;|$)");if(arr=this.doc.cookie.match(reg))return (arr[2]);elsereturn null;},/*** 移除cookie*/removeCookie : function (cName){var exp = new Date();exp.setTime(getNowDateTime() - 1);//当前日期-1var cval=this.getCookie(cName);if(cval!=null)this.doc.cookie= cName + "="+cval+";expires="+exp.toGMTString();},/*** 更改cookie的失效时间*/updateCookie : function (cName,cValue,cExpir){this.setCookie(cName,cValue,cExpir);},/*** 清空所有cookies*/clearCookies : function () {var keys = this.doc.cookie.match(/[^ =;]+(?=\=)/g);if (keys) {for (var i = keys.length; i--; )this.removeCookie(keys[i]);}}};/*** 创建cookies对象* @param {Object} options*/function singletenCookie(options){var options = options || {};var expirDateTime = getNowDateTime() + (options.expirDate * 24 * 3600 * 1000 || 24 * 3600 * 1000);//cookie的默认失效时间 单位为天var expirD = new Date();expirD.setTime(expirDateTime);this.expirDate = expirD;this.doc = document;//文档对象，操作cookiesextend(this,methods);return this;}/*** 获取当前时间,单位为毫秒*/function getNowDateTime(){var d = new Date();return d.getTime();}/*** 暂时没用默认失效时间单位为天* 获得指定的失效时间* s是代表秒:20s指20秒* h是指小时，如12小时则是：12h* d是天数，30天则：30d*/function getSpecificDate(str) {var str1 = str.substring(str.length-1) * 1;//字符串转数字var str2 = str.replace(str1,"");if (str2 == "s") {return str1 * 1000;} else if (str2 == "h") {return str1 * 60 * 60 * 1000;} else if (str2 == "d") {return str1 * 24 * 60 * 60 * 1000;}}/*** 类似继承方法* @param {Object} destination* @param {Object} source*/function extend(destination, source) {for (var property in source)destination[property] = source[property];return destination;}var _static = {name : "jCookies",getInstance : function (options){if(!instance)instance = new singletenCookie(options);return instance;}}return _static;
})();调用方式alert(document.cookie);var cookies = jCookies.getInstance();cookies.setCookie("test","123","1s");alert(cookies.getCookie("test"));//cookies.clearCookies();alert(document.cookie);