JavaScript对象复制拷贝

拷贝方法：

function clone(myObj) {
                if (typeof (myObj) != 'object') return myObj;
                if (myObj == null) return myObj;

                var myNewObj = new Object();

                for (var i in myObj)
                    myNewObj[i] = clone(myObj[i]);

                return myNewObj;
            }

调用：

var _data = {};
                        _data.currentItem = clone(item);