Find the HTML element by coordinate position (pageX,pageY)

Question

I have an input box which ask for the page coordinate position for x and y and I need to find which element is at the exact coordinate position of given x and y value on the page.

 

Example :

 

Input: x=100, y=100;

 

output: <a href='#' >this link is at position pageX=100 and pageY=100<a>

 

This can be any element of page according to coordinate position.

 

I will be very thankful to you!