(This book focuses on the combination of theory and practice, and comprehensively describes advanced DOM scripts. The book is divided into three parts: the first part is "in-depth understanding of DOM script", covering all aspects of W3C DOM specification, Including the support and non support of non-standard browsers: Part II, "communication outside the browser", with Ajax and client server communication as the theme; Part III, "some advanced script resources" , it focuses on some third-party script resources, including libraries and APIs. In addition, the last few chapters of each part are case studies to put the knowledge into practice. By studying the contents of the book, readers will be able to build their own DOM practical method library.This book is suitable for readers with web development and design experience.)