目前，很多网站都在为提升用户体验而努力，想尽多种办法让用户在网站上的操作更加舒适、人性化，就像这个图片预览小功能一样，不要说它很小，但是它发挥的作用很明显，在上传前预览一下图片，以免选择了错误的文件，上次写的无刷新文件上传系统最初的目的就是用来实现这个图片预览效果，程序中的Javascr ipt部分兼容ie6/7/8, firefox 3.5.5以及opera 10、safari 4.0.4、 chrome 3.0 等多种浏览器。

-Currently, many sites are in the efforts to enhance the user experience, try a variety of ways to make users more comfortable operating on the site, humane, just like the little features, like image preview, do not say that it is very small, but it played The role is very clear preview images before uploading, so chose the wrong file, the last non-refresh file upload to write the original purpose of the system is used to achieve this image preview, the program part of the Javascr ipt-compatible ie6/7/8, firefox 3.5.5 and opera 10, safari 4.0.4, chrome 3.0 and other browsers.