jQuery是一款免费且开放源代码的java scr ipt代码库，由John Resig创建。授权协议为GPL和MIT许可证双协议。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 is a free and open source java scr ipt code base, created by John Resig. License GPL and MIT licenses for the dual protocol. It is lightweight js library (compression 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 allows users to more easily deal with HTML documents, events, to achieve animation effects, and easy for website AJAX interaction. jQuery also has a relatively large advantage is that its documentation is very full, and a variety of applications are very detailed, while many mature plug-ins to choose from.