在一些图片比较多的网页上看到一个功能，就是当网页右侧的滚动条下拉的时候，下面的图片才慢慢显示出来，还有一些渐渐显示的效果。发现这样的效果不错，可以提高网页的打开速度。我在网上找了很长时间，才知道这叫“图片异步加载”功能。在网上找了一下，找到了完整的代码，我把发到这里来，给大家学习。-In some of the pictures to see a number of web pages, is when the right side of the page scroll down the time, the following picture is slowly displayed, there are some gradually show the effect of the. Found that this effect is good, can improve the speed of the web. I found a long time on the Internet to know that this is called　asynchronous loading of the picture　function. On the Internet to find a look, to find a complete code, I sent here to learn.