北漂IT民工的博客

var Cookie = function(name, val, expires, path, domain, secure){
    path = path || null;
    domain = domain || null;
    secure = secure || false;
    function set(key, value){
      var str = key + "=" + escape(value);
      if(expires > 0){
        var date = new Date();
        var ms = expires * 60 * 1000;
        date.setTime(date.getTime() + ms);
        str += ";expires=" + date.toGMTString();
      }
      if(path) str += ";path=" + path;
      if(domain) str += ";domain=" + domain;
      if(secure) str += ";true";
      document.cookie = str;
      return str;
    }
    function get(key){
      key = key || name;
      var strArray = document.cookie.split(';');
      for(var i = 0; i < strArray.length; i++)
      {
        var tmp = strArray[i].split('=');
        if(trim(tmp[0]) == trim(key)){
          return unescape(tmp[1]);
        }
      }
      return "";
    }
    function remove(key){
      var date = new Date();
      var ms = 1000;
      date.setTime(date.getTime() - ms);
      var str = name + "=nothing;expires=" + date.toGMTString();
      document.cookie = str;
    }
    function setExt(key, value){
      switch(key){
        case 'path':
          path = value;
          break;
        case 'domain':
          domain = value;
          break;
        case 'secure':
          secure = value;
          break;
        case 'expires':
          expires = value;
          break;
        default:
          set(key, value);
          break;
      }
    }
    return {
      get: get,
      set: setExt,
      remove: remove
    }
}

调用方法：

var cookieName = 'my_cookie';
var cookie = Cookie(cookieName, 1);
cookie.set(cookieName, 1);
cookie.remove(cookieName);
cookie.get(cookieName)