副檔名問題

1.請至以下連結操作便可有副檔名
http://changyang319.pixnet.net/blog/post/32570045-%E5%9C%A8windows8%E4%B8%AD%E9%A1%AF%E7%A4%BA%E6%89%80%E6%9C%89%E7%9A%84%E9%9A%B1%E8%97%8F%E7%9A%84%E6%AA%94%E6%A1%88%E3%80%81%E8%B3%87%E6%96%99%E5%A4%BE%E5%8F%8A