7.3. Microsoft Internet Explorer
Unlike most other web browsers, Microsoft Internet Explorer uses something called ActiveX, which is a holdover from an earlier age when object libraries where new, untried, and obscure. Because of this, ActiveX is like the bowels of a ship: Sometimes nasty things are down there. In the case of ActiveX, the ship is a spaceship named Nostromo. However, this isn't a "knock Internet Explorer" session. You'll find enough of those online today.
var objXMLHTTP = new ActiveXObject('Microsoft.XMLHTTP');
So now that we've got a potential source of XML, the big question is how to handle it.