This should work in everything, I think, to get an XMLHttpRequest object
for JavaScript in your browser:
http = window.XMLHttpRequest ? new window.XMLHttpRequest : (window.ActiveXObject ? new ActiveXObject("MSXML2.XMLHTTP"): null);
Of course, this only applies if you’re not using a library to make all
this stuff go away, which you maybe should be. But if you’re not, this
is a very short way to get the thing you need for Ajax.
Shortest way to create an XMLHttpRequest object
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