How would you use jquery to get the element at a particular x, y coordinate? You can .offset and .position to find absolute and relative position using jquery.
Provided you know the exact coordinates relative to the document:
function getElsAt(top, left){return $("body").find("*").filter(function(){return $(this).offset().top == top && $(this).offset().left == left})}
The other answer stops at the first overlay.