XMLHttp Request was developed by Mozilla from an Active X object named XMLHTTP and created by Microsoft.
The use of XMLHttp Request in 2005 by Google, in Gmail and Google Maps has contributed to the success of this format.
When you select a new color from the dropdown list, the change is reflected in the label control below it, and because of the Update Panel around it, no real postback is performed and the label is updated without the page reloading.
This is all very good, but as you can see, no matter how many times you change the color, the URL does not change and no state is tracked, resulting in dead Back and Forward buttons.
For example, fields of forms, choices of user, may be processed and the result displayed immediately into the same page.
Ajax is a set of technologies, supported by a web browser, including these elements: We have to wait for the data to be available to process it, and in this purpose, the state of availability of data is given by the ready State attribute of XMLHttp Request.
s content and load them into your existing page without having to refresh the whole page. With the addition of CSS and PHP, frames have become outdated, but if you wish to use them, read on.Frames are most typically used to have a menu in one frame, and content in another frame.This tutorial will be useful for web developers who want learn how to create interactive webpages as well as improve their speed and usability using AJAX.It is highly recommended that you are familiar with HTML and Java Script before attempting this tutorial.