function cookie(name, value, expires, path, domain, secure) {      // 初始化      this.name = name;      this.value = value;      this.expires = expires;      this.path = path;      this.domain = domain;      this.secure = secure;            // 读取cookie      this.read = function () {          // 快捷操作          var ck = document.cookie;                    var arg = this.name + "=";          var alen = arg.length;          var clen = ck.length;          var i = 0;          while (i < clen) {              var j = i + alen;              if (ck.substring(i, j) == arg) {                  var endstr = ck.indexOf(";", j);                  if (endstr == -1)                      endstr = ck.length;                  return unescape(ck.substring(j, endstr));              }              i = ck.indexOf(" ", i) + 1;              if (i == 0)                  break;          }          return null;      }            // 设置cookie      this.set = function () {          // 更新cookie过期时间          expStore = this.expires;                    exp = new Date();          base = new Date(0);          skew = base.getTime();          if (skew > 0)              exp.setTime(exp.getTime() - skew);          exp.setTime(exp.getTime() + (this.expires * 24 * 60 * 60 * 1000));          this.expires = exp;                    document.cookie = this.name + "=" + escape(this.value) +              ((this.expires) ? "; expires=" + this.expires.toGMTString() : "") +              ((this.path) ? "; path=" + this.path : "") +              ((this.domain) ? "; domain=" + this.domain : "") +              ((this.secure) ? "; secure" : "");                    // 刷新cookie类中的cookie过期时间          this.expires = expStore;      }            // 删除cookie      this.kill = function () {          document.cookie = this.name + "=" +              ((this.path) ? "; path=" + this.path : "") +              ((this.domain) ? "; domain=" + this.domain : "") +              "; expires=Thu, 01-Jan-70 00:00:01 GMT";      }            // 更改cookie类中的cookie属性      this.changeName = function (chName) {          this.kill();          this.name = chName;          this.set();      }      this.changeVal = function (chVal) {          this.kill();          this.value = chVal;          this.set();      }      this.changeExp = function (chExp) {          this.kill();          this.expires = chExp;          this.set();      }      this.changePath = function (chPath) {          this.kill();          this.path = chPath;          this.set();      }      this.changeDomain = function (chDom) {          this.kill();          this.domain = chDom;          this.set();      }      this.changeSecurity = function (chSec) {          this.kill();          this.secure = chSec;          this.set();      }  }