Web standards, English for Web Standards. ‘Standards’ is a complex word, it is a collection of norms, is jointly developed by the W3C and other standardization organizations, use it to create and explain the basic content of the pageWEB standard is not a standard, but a collection of standards. A web page consists of three parts: Structure, Presentation, and Behavior. The corresponding standard is also divided into three aspects: the structure of the standard language, including XHTML and XML, the performance of the standard language, including CSS, the main standard of behavior, including object models (such as W3C DOM), ECMAScript and so on.Which the main members are