YouTipXMLHttpRequest Object |
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XMLHttpRequest Object
The XMLHttpRequest Object is used to exchange data with the server in the background.
The XMLHttpRequest Object is a developer's dream, because you can:
- Update webpages without reloading the page
- Request data from the server after the page has loaded
- Receive data from the server after the page has loaded
- Send data to the server in the background
To learn more about the XMLHttpRequest Object, please study our XML DOM Tutorial.
XMLHttpRequest Instance
When you type a character in the input field below, an XMLHttpRequest is sent to the server - returning suggested names (from a file on the server):
Type a letter in the input box:
First Letter
Suggestions:
Create an XMLHttpRequest Object
All modern browsers (IE7+, Firefox, Chrome, Safari, and Opera) have a built-in XMLHttpRequest object.
Syntax for creating an XMLHttpRequest object:
xmlhttp=new XMLHttpRequest();For older versions of Internet Explorer (IE5 and IE6), use an ActiveX object:
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");In the next chapter, we will use the XMLHttpRequest object to retrieve XML information from the server.