extra bits (cont.)
128 enabling an Ajax search
This book provides all the code and knowledge required to add Ajax functionality
to a Web site. But, as with most things, there??™s a lot more to be learned.
This appendix will steer you in other useful directions and provide the occassional
code snippet as alternatives to the code used elsewhere in the book.
appendix
where to go from here
129
Ajax issues
Ajax is a wonderful technology that can greatly enhance a user??™s
Web experience, but it??™s not perfect. In particular, you should be
aware of the following limitations:
1 If a user??™s browser does not support JavaScript, Ajax is useless.
(See extra bits on page 146.)
2 The results of Ajax-enabled pages cannot be bookmarked
without taking extra steps.
3 The user cannot use the back button or their browser??™s history
to review previous results (again without taking extra steps).
4 Search engines cannot index Ajax pages.
5 Ajax applications can be more demanding of the browser.
6 Because Ajax pages change the standard client-server relationship,
their use may be confusing for the end user.
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