function obr(obrazek,width,height) {
    window.open(obrazek, "", "toolbar=no,directories=no,menubar=no,width=" + width + ",height=" + height + ",scrollbars=no,titlebar=0,resizable=0");
}

function film_popup(url) {
    window.open(url, "", "toolbar=no,directories=no,menubar=no,width=570,height=570,scrollbars=yes,titlebar=0,resizable=0");
}


/* maximalni vyska textu v pixelech */
READ_MORE_MAX = 100;

function show_read_more_button() {
    txt = document.getElementById('STRANKA-OBSAH');
    if (txt.scrollHeight > READ_MORE_MAX) {
        txt.style.height=READ_MORE_MAX + "px";
        txt.style.overflow="hidden";
        document.write("<div id='READ-MORE'><a href='javascript:text_read_more();'>[Zobrazit celư text]</a></div>");
    }
}


function text_read_more() {
    txt = document.getElementById('STRANKA-OBSAH');
    txt.style.height="auto";
    txt.style.overflow="visible";

    btn = document.getElementById('READ-MORE');
    btn.style.display="none";
}