js对象深度克隆

   function deepClone(origin, target) {
            var target = target || {};
            for (var prop in origin) {
                if (origin.hasOwnProperty(prop)) {//判断是否是原型属性
                    if (typeof (origin[prop]) == 'object') {//判断是否对象

                        if (origin[prop] !== 'null' && Object.prototype.toString.call(origin[prop]) == '[object Array]')//判断是否是数组 
                            target[prop] = [];
                        else
                            target[prop] = {};
                        deepClone(origin[prop], target[prop]);
                    } else
                        target[prop] = origin[prop];
                }
            }
            return target;
        }