之前做深拷贝时候总少一些内容，经过不断查找并实践，觉得此方法比较完善，特记录下来
function deepCopy(initalObj, finalObj){
    var obj = finalObj || {};
    for (var i in initalObj) {
        if (typeof initalObj[i] === 'object') {
            obj[i] = (Object.prototype.toString.call(initalObj[i]) === '[object Object]') ? {} :
                (Object.prototype.toString.call(initalObj[i]) === '[object Array]') ? []:null;
            arguments.callee(initalObj[i], obj[i]);
        } else {
            obj[i] = initalObj[i];
        }
    }
    return obj;
}