XMLHttpRequest is the object that enables the JavaScript code to make asynchronous HTTP server requests. This functionality allows you to make HTTP requests, receive responses, and update parts of the page completely in the background, without the user experiencing any visual interruptions. This is very important because one can keep the user interface responsive while interrogating the server for data.
Internet Explorer implements XMLHttpRequest as an ActiveX object, and other browsers such as Firefox, Safari, and Opera implement it as a native JavaScript object.
Internet Explorer implements XMLHttpRequest as an ActiveX object, and other browsers such as Firefox, Safari, and Opera implement it as a native JavaScript object.
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