Simplest AJAX call with Raw JavaScript

Simplest AJAX

window.onload =  function(){
  
		var xhr;

		if(typeof XMLHttpRequest !== 'undefined') xhr = new XMLHttpRequest();
		else {
var versions =["MSXML2.XmlHttp.5.0","MSXML2.XmlHttp.4.0","MSXML2.XmlHttp.3.0","MSXML2.XmlHttp.2.0","Microsoft.XmlHttp"];

			 for(var i = 0, len = versions.length; i < len; i++) {
                           try {
                                 xhr = new ActiveXObject(versions[i]);
                                 break;
                           }
                           catch(e){}
			 } // end for
		}

		xhr.onreadystatechange = ensureReadiness;

		function ensureReadiness() {
                  
			if(xhr.readyState < 4) {
				return;
			}

			if(xhr.status !== 200) {
				return;
			}

			// all is well
			if(xhr.readyState === 4) {
                             alert(xhr.responseText); 
			}
		}

		xhr.open('GET', 'https://graph.facebook.com/motyar', true);
		xhr.send('');
};

//Check working example at http://jsbin.com/aqumup

great artice..
Is still in use or new changes done? suggest any other framework for async call.. like angular, knockout..
Is this RA ajax?