php/www/js/cookie.js

var Cookie = {
  cookieAPI:{
    get: function(name){
      var nameEQ = name + "=";
      var ca = document.cookie.split(';');//把cookie分割成组
      for(var i=0;i < ca.length;i++) {
        var c = ca[i];//取得字符串
        while (c.charAt(0)==' ') {//判断一下字符串有没有前导空格
          c = c.substring(1,c.length);//有的话，从第二位开始取
        }
        if (c.indexOf(nameEQ) == 0) {//如果含有我们要的name
          return unescape(c.substring(nameEQ.length,c.length));//解码并截取我们要值
        }
      }
      return false;
    },
    set: function(name, value, options){
      if (Cookie.isPlainObject(name)) {
        for (var k in name) {
          if (name.hasOwnProperty(k)) this.set(k, name[k], value);
        }
      }else{
        var opt = Cookie.isPlainObject(options) ? options : { expires: options },
          expires = opt.expires !== undefined ? opt.expires : '',
            expiresType = typeof(expires),
            path = opt.path !== undefined ? ';path=' + opt.path : ';path=/',
            domain = opt.domain ? ';domain=' + opt.domain : '',
            secure = opt.secure ? ';secure' : '';

          //过期时间
        if (expiresType === 'string' && expires !== '') expires = new Date(expires);
        else if (expiresType === 'number') expires = new Date(+new Date + 1000 * 60 * 60 * 24 * expires);
        if (expires !== '' && 'toGMTString' in expires) expires = ';expires=' + expires.toGMTString();


        document.cookie = name+"="+escape(value)+expires+path+domain+secure;   //转码并赋值
      }
    },
    remove: function(names){
      names = Cookie.isArray(names) ? names : Cookie.toArray(arguments);
      for (var i = 0, l = names.length; i < l; i++) {
        this.set(names[i], '', -1);
      }
      return names;
    },
    clear: function(name){
      return this.remove(Cookie.getKeys(this.all()));
    },
    all:function () {
      if (document.cookie === '') return {};
      var cookies = document.cookie.split('; '),result = {};
      for (var i = 0, l = cookies.length; i < l; i++) {
        var item = cookies[i].split('=');
        result[unescape(item[0])] = unescape(item[1]);
      }
      return result;
    }
  },
  getKeys: Object.names || function (obj) {
    var names = [],name = '';
    for (name in obj) {
      if (obj.hasOwnProperty(name)) names.push(name);
    }
    return names;
  },
  isPlainObject:function (value) {
    return !!value && Object.prototype.toString.call(value) === '[object Object]';
  },
  isArray:function (value) { return value instanceof Array },
  toArray:function (value) {
    return Array.prototype.slice.call(value);
  }
}
cookie=function (name, value, options){
  var argm = arguments,
  _cookie=function(){
    if (argm.length === 0) return cookie.clear();
      if (Cookie.isPlainObject(name) || (argm.length>1&&name&&value))
        return cookie.set(name, value, options);
      if (value === null) return cookie.remove(name);
      if (argm.length === 1) return cookie.get(name);
      return cookie.all();
  }
  return _cookie()
}
for (var a in Cookie.cookieAPI) cookie[a]=Cookie.cookieAPI[a];