JS 深复制对象 【克隆】

var cloneObj = function (obj) {    var str, newobj = obj.constructor === Array ? [] : {};    if (typeof obj !== 'object') {        return;    } else if (window.JSON) {        str = JSON.stringify(obj), //序列化对象            newobj = JSON.parse(str); //还原    } else {        for (var i in obj) {            newobj[i] = typeof obj[i] === 'object' ? cloneObj(obj[i]) : obj[i];        }    }    return newobj;};