Introduction to Developing Web Applications with AJAX - Part …

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an Eclipse Project section in the first part of this AJAX tutorial. So, the ajax.war web application is copied to the deploy directory of the default web …

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Introduction to Developing Web Applications with AJAX - Part 2 [pri… http://www.regdeveloper.co.uk/2006/06/20/ajax_web_tutorial_part2/pr…
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Original URL: http://www.regdeveloper.co.uk/2006/06/20/ajax_web_tutorial_part2/
Introduction to Developing Web Applications with AJAX
- Part 2
By Deepak Vohra
Published Tuesday 20th June 2006 12:45 GMT
Tutorial Suppose you fill out a form that requires a unique field value, for example a
userid in a registration form. Ordinarily, you would specify a userid value and the other
field values and submit the form with the Submit button. If the userid is not already taken
you would be able to register, but if the userid is taken you would get a message that the
user id value is invalid and you would have to fill out and resubmit the entire form.
With the AJAX web technique the userid value may be validated at the time the value is
specified in the input form, thus avoiding any need to resubmit the form.
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