Jquery是继prototype之后又一个优秀的Javascrīpt框架。它是轻量级的js库(压缩后只有21k) ，它兼容CSS3，还兼容各种浏览器 （IE 6.0+, FF 1.5+, Safari 2.0+, Opera 9.0+）。jQuery使用户能更方便地处理HTML documents、events、实现动画效果，并且方便地为网站提供AJAX交互。jQuery还有一个比较大的优势是，它的文档说明很全，而且各种应用也说得很详细，同时还有许多成熟的插件可供选择。jQuery能够使用户的html页保持代码和html内容分离，也就是说，不用再在html里面插入一堆js来调用命令了，只需定义id即可。

-Jquery is the second prototype followed by a good Javascrīpt framework. It is lightweight js library (compressed only 21k), it is compatible with CSS3, also compatible with all browsers (IE 6.0+, FF 1.5+, Safari 2.0+, Opera 9.0+). jQuery makes it easier for users to handle HTML documents, events, to achieve animation effects, and to provide easy AJAX for interactive web site. jQuery also has a relatively large advantage is that it' s documentation is full, but also very detailed applications, as well as many mature plug-in available. jQuery allows users to keep the html page code and html content separation, that is, no longer inserted inside a bunch of js in the html to call the command, and you can just define id.