说明：  asp.net 页面实现图片处理 1）实现缩放图片：加载图片时根据屏幕缩放图片； 2）实现图片的翻转、旋转； 3）实现图片的放大、缩小、还原初始大小； 4）实现图片的拖拽、滚轮放大缩小图片； 5）浮动控制按钮对图片进行控制(div)
(To achieve scaling picture: load image scaling in accordance with the screen image 2》To achieve the turnover picture, rotate 3》To achieve a picture to enlarge and narrow, to restore the initial large 4》The realization of the drag image, zoom wheel picture 5》Floating control button on the control picture (div) )