How to close ajax requested page

Hi Experts,

I have an ajax request in order to load a php file, which essentially displays a pop-up. I use the code below:

$('input[name="rsrvButton"]').click(function() {
  mygetrequest.open("GET", "includes/content/bs/b_popup-reserve.php?bookingData=" + $(this).attr('id'), true);
  mygetrequest.send(null);
  e.preventDefault();
});

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It works great, but how could I close it in the same elegant way as I open it? Maybe something like the following?

mygetrequest.close()

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Thanks in advance.