HISTORY of DRAG and DROP

The XMLHttpRequest object is an education developer's dream come true since instructors can: 1.) Update a web page without reloading the page. 2.) Request data from a server after the page has loaded. 3.) Receive data from a server after the page has loaded. 4.) Send data to a server in the background. This object behavior is named Ajax, but Ajax is not a single technology. Ajax is a group of technologies. To begin with HTML and CSS can be used in combination to markup and style information. The webpage can then be modified by JavaScript to dynamically display – and allow the user to interact with — the new information. Microsoft invented the XHR object in 1999. It took the Web World 6 six years to catch up and use the new technology. When these technologies are combined in the Ajax model, Web applications are able to make quick, incremental updates to the user interface without reloading the entire browser page. Today many sophisticated Learning Management Systems incorporate Ajax allowing instructors to reconfigure their user view in their online class without reloading the page.