/* 对cookie的操作 */
//创建
var Cookie = new Object();
//设置(修改)属性和方法
Cookie.setCookie = function(sName, sValue, oExpires, sPath, sDomain, bSecure) {
  var sCookie = sName + "=" + escape(sValue); // 名称和值
  if (oExpires) {
    sCookie += "; expires=" + oExpires.toGMTString(); // 过期时间
  }
  if (sPath) {
    sCookie += "; path=" + sPath; // 访问路径
  }
  if (sDomain) {
    sCookie += "; domain=" + sDomain; // 访问路径
  }
  if (bSecure) {
    sCookie += "; true"; // 安全性
  }
  document.cookie = sCookie;
}
//获取
Cookie.getCookie = function(sName) {
  var cookieArray = document.cookie.split(";"); //得到分割的名值对
  var tempCookie = new Object();
  for (var i = 0; i < cookieArray.length; i++) {
    var tempArr = cookieArray[i].split("="); //将名称和值分开
    if (tempArr[0] == sName) { //如果是指定的cookie，返回它的值
      return unescape(tempArr[1]);
    }
  }
  return "There's no such a cookie name!";
}
//删除
Cookie.deleteCookie = function(sName, sPath, sDomain) {
  var sCookie = sName + "=; expires=" + (new Date(0)).toGMTString(); // 设置名称为空，过期时间为0，也可以设置过期时间为负数 (var sCookie = sName + "=; expires=-1"; )
  if (sPath) {
    sCookie += "; path=" + sPath;
  }
  if (sDomain) {
    sCookie += "; domain=" + sDomain;
  }
  document.cookie = sCookie;
}
function test() {
  Cookie.setCookie("test", "cookieTest");
  alert(Cookie.getCookie("test"));
  alert(Cookie.getCookie("test2")); // ???
  Cookie.deleteCookie("test");
  alert(Cookie.getCookie("test"));
}

String.prototype.Trim = function()
{
  return this.replace(/^\s+/g,"").replace(/\s+$/g,"");
}
function JSCookie()
{
  this.GetCookie = function(key)
  {
    var cookie = document.cookie;
    var cookieArray = cookie.split(';');
    var getvalue = "";
    for(var i = 0;i<cookieArray.length;i++)
    {
      if(cookieArray[i].Trim().substr(0,key.length) == key)
      {
        getvalue = cookieArray[i].Trim().substr(key.length + 1);
        break;
      }
    }
    return getvalue;
  };
  this.GetChild = function(cookiekey,childkey)
  {
    var child = this.GetCookie(cookiekey);
    var childs = child.split('&');
    var getvalue = "";
    for(var i = 0;i < childs.length;i++)
    {
      if(childs[i].Trim().substr(0,childkey.length) == childkey)
      {
        getvalue = childs[i].Trim().substr(childkey.length + 1);
        break;
      }
    }
    return getvalue;
  };
  this.SetCookie = function(key,value,expire,domain,path)
  {
    var cookie = "";
    if(key != null && value != null)
      cookie += key + "=" + value + ";";
    if(expire != null)
      cookie += "expires=" + expire.toGMTString() + ";";
    if(domain != null)
      cookie += "domain=" + domain + ";";
    if(path != null)
      cookie += "path=" + path + ";";
    document.cookie = cookie;
  };
  this.Expire = function(key)
  {
    expire_time = new Date();
    expire_time.setFullYear(expire_time.getFullYear() - 1);
    var cookie = " " + key + "=e;expires=" + expire_time + ";"
    document.cookie = cookie;
  }
}

var cookie = new JSCookie();
//普通设置
cookie .SetCookie("key1","val1");
//过期时间为一年
var expire_time = new Date();
expire_time.setFullYear(expire_time.getFullYear() + 1);
cookie .SetCookie("key2","val2",expire_time);
//设置域及路径，带过期时间
cookie .SetCookie("key3","val3",expire_time,".cnblogs.com","/");
//设置带子键的cookie,子键分别是k1,k2,k3
cookie .SetCookie("key4","k1=1&k2=2&k3=3");

//简单获取
cookie .GetCookie("key1");
cookie .GetCookie("key2");
cookie .GetCookie("key3");
cookie .GetCookie("key4");
//获取key4的子键k1值
cookie .GetChild("key4","k1");

cookie .Expire("key1");
cookie .Expire("key2");
cookie .Expire("key3");
cookie .Expire("key4");