用AS3写的平滑图片滚动，完全的无缝滚动哦， 使用方法： 在AS3中，直接引用包文件就可以轻松实现图片的平滑滚动。-Images with smooth scroll written in AS3 is completely seamless rolling Oh, use the method: in AS3, refer directly to the package file you can easily picture th