Using this search [google.com] will results in several articles on why AJAX is better, what you and your visitors can gain from it.
10:02 pm on Jan 21, 2008 (gmt 0)
AJAX makes the user experience much...well...cooler, faster, etc... It also opens up many new opportunities as it allows you to communicate with the server through a request without actually refresh the page at all. The possibilities are nearly endless.
12:13 pm on Jan 22, 2008 (gmt 0)
Ajax is very useful. In terms of implementation I've found a framework like prototype or mootools can be helpful too, and can result in some very simple code.