Button-click counter for someone else's site

everyone! I am looking for the solution for button-click counter. But, I have no oppotunity to do something on the front-side or the back-side. For example, I have a person that clicks the button more than 1000 times a day.And he does not want to count it by himself. He wants just click a buttn and see that some kind of counter increased by one. So, I want a tool that works like that: 1 - Allows to choose a button on the web-site. 2 - Then the counter = 0 appears. 3 - After clicking the chosen button, the counter = 1.