Anilrgowda

When you want a user to send data to your server — once they have filled out a form, for example — they normally have to submit the form and then wait as the entire page is refreshed. Similarly, if you want to retrieve new data from the server, you have no choice but to load a whole new page.
This is inefficient, time-consuming, and particularly frustrating if there’s only a small amount of data being sent back and forth. In this tutorial, you’ll be introduced to Ajax, a technology that allows you to send these requests through small JavaScript calls, meaning the user doesn’t have to wait for the page to refresh.