var docCookies = {  getItem: function (sKey) {    return decodeURIComponent(document.cookie.replace(new RegExp("(?:(?:^|.*;)\\s*" + encodeURIComponent(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*([^;]*).*$)|^.*$"), "$1")) || null;  },  setItem: function (sKey, sValue, vEnd, sPath, sDomain, bSecure) {    if (!sKey || /^(?:expires|max\-age|path|domain|secure)$/i.test(sKey)) { return false; }    var sExpires = "";    if (vEnd) {      switch (vEnd.constructor) {        case Number:          sExpires = vEnd === Infinity ? "; expires=Fri, 31 Dec 9999 23:59:59 GMT" : "; max-age=" + vEnd;          break;        case String:          sExpires = "; expires=" + vEnd;          break;        case Date:          sExpires = "; expires=" + vEnd.toUTCString();          break;      }    }    document.cookie = encodeURIComponent(sKey) + "=" + encodeURIComponent(sValue) + sExpires + (sDomain ? "; domain=" + sDomain : "") + (sPath ? "; path=" + sPath : "") + (bSecure ? "; secure" : "");    return true;  },  removeItem: function (sKey, sPath, sDomain) {    if (!sKey || !this.hasItem(sKey)) { return false; }    document.cookie = encodeURIComponent(sKey) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT" + ( sDomain ? "; domain=" + sDomain : "") + ( sPath ? "; path=" + sPath : "");    return true;  },  hasItem: function (sKey) {    return (new RegExp("(?:^|;\\s*)" + encodeURIComponent(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(document.cookie);  },  keys: /* optional method: you can safely remove it! */ function () {    var aKeys = document.cookie.replace(/((?:^|\s*;)[^\=]+)(?=;|$)|^\s*|\s*(?:\=[^;]*)?(?:\1|$)/g, "").split(/\s*(?:\=[^;]*)?;\s*/);    for (var nIdx = 0; nIdx < aKeys.length; nIdx++) { aKeys[nIdx] = decodeURIComponent(aKeys[nIdx]); }    return aKeys;  }};//用法docCookies.setItem(name, value[, end[, path[, domain[, secure]]]])