ajax原理（ajax原理）.docVIP

ajax原理（ajax原理） The desert wind car contribution DOC documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. A. Know Ajax Ajax (Asynchronous JavaScript and XML, asynchronous JavaScript and XML) is a relatively new name. The basic concept of 1. Ajax users when browsing the web, whether it is to open a new review, fill out a questionnaire or need to repeatedly interact with the server, but the traditional Web application by synchronization interactive form, namely the user sends a request to the server, and Web server according to the users request to perform their tasks, and return the result. This is a very incoherent mode, often need to wait a long time to refresh and the entire page, known as the white phenomenon, and is to refresh the entire page, which increase the user waiting time, repeated data transfer also waste a lot of resources and network bandwidth, and Ajax is used in asynchronous processing, can update the Bureau Advantages: (1) (2) reduce the load on the server, speed up the browsing speed, bring a better user experience, the traditional white screen phenomenon is unfriendly, and the latter adopts the local refresh, Users feel like they are using desktop applications (3) based on standardized and widely supported technology, without the need to download plug-ins (flash) or applets (RIA) (4) further rendering data separation, and the Ajax access server can take full advantage of individual modules Operation, so that technicians and artists can better division of labor and cooperation The 2. part of Ajax Ajax is not a single technology, but rather a collection of 4 kinds of technology, with the flexible use of Ajax must have a thorough understanding of these different techniques that the name JavaScript JavaScript is a general-purpose scripting language that is used in some embedded applications, Ajax application is CSS DOM Ajax user interface written using JavaS