The popularity of Ajax is increasing day by day. One of the best example as used by google is google suggest. Here based on the user keywords entered at search box, google returns matching keywords or extension of this words as searched before by users.
Checking Script support
As Ajax depends on client side scripting, we need to check the script support is enabled ( in browser ) or not. Here is the code we can use to display message if scripting is disabled.
<noscript>Your browser does not support scripts, you have to enable it to run this page</noscript>
Ajax combined with PHP is so interesting, I thought programming with ajax is difiicult but now my mind is opened. So if I can ask, Is there a specific part of which when I am saying I want to learn Ajax, I should start with?