本书讲述了javascr ipt和dom的基础知识，但重点放在dom编程技术背后的思路和原则：预留退路、循序渐进和以用户为中心等，这些概念对于任何前端web开发工作都非常重要。本书将这些概念贯穿在书中的所有代码示例中，使你看到用来创建图片库页面的脚本、用来创建动画效果的脚本和用来丰富页面元素呈现效果的脚本，最后结合所讲述的内容创建了一个实际的网站。(This book describes the basic knowledge of Javascr ipt and DOM, but focuses on the ideas and principles behind DOM programming technology: reserved, gradual, and user centered. These concepts are very important for any front-end web development. The concept of all the code examples in the book, you see the picture library used to create the page, the scr ipt used to create animation scr ipts and to enrich the page elements rendering scr ipt, finally described the content to create a real web station.)