drill_greasemonkey_version.js

// ==UserScript==
// @name         FI Drill keybindings
// @author       David Pavlík
// @match        https://kabell.sk/fi_muni_drill/**
// @grant        none
// @require https://code.jquery.com/jquery-3.3.1.slim.min.js
// ==/UserScript==

document.addEventListener('keypress', event => {
  
    const bindings = {
        'd': 'body > div.container.main > div > div.col-sm-9 > div:nth-child(3) > div div:contains(ne)',
        'k': 'body > div.container.main > div > div.col-sm-9 > div:nth-child(3) > div div:contains(ano)',
        ' ': 'body > div.container.main > div > div.col-sm-9 > div:nth-child(4) > div:nth-child(3) > a'
    }

    const selector = bindings[event.key];
  	if(typeof selector !== "undefined"){
      const element = $(selector)[0];
      element.click();
    }
})