某天一朋友突然发来一个地址，问我怎么获取这张图片的后缀名？？ 将代码放在下面以供参考：
I am trying to create basically a puzzle in Flex Builder 3. I display images from an array onto a canvas that can be dragged and dropped around the canvas. My problem is that I don\'t want the images
加载中,请稍侯......