ns.getXHRObject = function() {

if (typeof(window.XMLHttpRequest) === “function”) {
// Native object exists
ns.getXHRObject = function() {
return new window.XMLHttpRequest();
};
}
else {
// Do your older browser searching here and replace the outcome with
// a similar new function definition as above..
}
};

Next time the function is called, the caching is returned. So execution will be faster the
second time.. imagine doing this for functions which will do lots of logic over and over again with the same outcome.. this can save lots of cpu cycles.. and better yet, improve user experience..