Roumenuv Rouming Fit Pictures

// ==UserScript==
// @name        Roumenuv Rouming Fit Pictures
// @namespace   Violentmonkey Scripts
// @match       https://www.rouming.cz/roumingShow.php?file=*
// @grant       none
// @version     1.0
// @description Resizes pictures that are too wide to fit the screen.
// ==/UserScript==

function setMaxWidth() {
  document.getElementsByTagName("img")[0].style.maxWidth = document.documentElement.clientWidth + "px";
}

setMaxWidth();
window.addEventListener("resize", setMaxWidth);