图片在网页指定区域内拖动的JS代码，类似放大的效果，但有本质上的区别。如截图所示，两张图片分别在作者规定的两个方框内拖动，互不干扰，智能判断图片大小，如果拖动到了图片边缘，则不能再拖动了，相信对学习JS的朋友是个帮助。-Picture drag in the JS code page specified area, zoom effect is similar, but there are essential differences. As shown in the screenshot, two pictures within two blocks of each prescribed drag, interfering, intelligent judgment image size, if you drag the edges of the pictures, you can not drag, I believe learning JS friend is a help.