Dhtml: Dynamic html is not a new language, but an integration of html, CSS and client script. Using Dhtml technology, web designers can create pages that can interact with users and contain dynamic content. The key is to master the grammar of HTML first.
Xml: Extensible Markup Language. In the Internet environment, XML is a cross-platform and content-related technology. It is a powerful tool for processing structured document information at present. It can be used to store data.
Css: Style sheet, assisting html to achieve more beautiful effects. Ext technology is easier to implement than these now, and it has better effect, less code and easier to learn.