window.onload = function(){
        const frm = document.getElementById("kamera");
        var ifrm = document.createElement("iframe");
        ifrm.setAttribute("src", "https://kamera1.mujavornik.cz/");
        ifrm.frameborder="0";
        ifrm.style.height = "1000px";
        ifrm.style.width = "100%";
        ifrm.style.border = "0";
        ifrm.scrolling="no";
        ifrm.style.overflow="hidden";
        frm.appendChild(ifrm);
        }