kur_za_obb.js

// ==UserScript==
// @name     Кур за ОББ
// @version  1
// @grant    none
// @include  https://ebb.ubb.bg/*
// ==/UserScript==

function addBadge() {
    const badge = document.createElement("div");
    badge.textContent = "КУР ЗА ОББ";

    Object.assign(badge.style, {
        backgroundColor: "#e63946",
        color: "#ffffff",
        fontFamily: "Arial, sans-serif",
        fontSize: "14px",
        fontWeight: "bold",
        left: "0",
        padding: "10px 14px",
        pointerEvents: "none",
        position: "fixed",
        top: "0",
        zIndex: "2147483647"
    });

    document.body.appendChild(badge);
}

function fixInputField(id) {
    const input = document.getElementById(id);
    if (!input) {
        return;
    }

    input.onpaste = null;
    input.removeAttribute("onpaste");

    input.oncopy = null;
    input.removeAttribute("oncopy");

    input.oncut = null;
    input.removeAttribute("oncut");
}

window.addEventListener("load", function () {
    addBadge();
    fixInputField("idLoginName");
    fixInputField("idPass");
});