Based on Ajax technology´s online time functional analysis and implementation

With the continuous development of Internet technology and Page Content´s Diversity form, Traditional page model Shows its drawbacks. Ajax technology can transfer important information between client and Server-side, that increases the speed of transmission and make the page responds more timely. This technology is widely used in online examination system´s design. Text starts from Ajax technology, and that compares with traditional page model, finally, examination timing function is analyzed, and design implementation.