jQuery is a great tool through which you can create websites with much richer functionality.
Here are the examples of applications using AJAX:
Google Map, Gmail, Facebook Tabs and Youtube. These application uses AJAX to provide a more responsive, desktop-like experience.
Different browsers have different syntax for AJAX implementation thatâ€™s why writing regular AJAX code is a bit tricky. So to test for different browsers you have to write the extra code.
But AJAX takes care of the browser differences and simplifies the process of implementing AJAX. Now you can write AJAX functionality with only one single line of code.