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


function elementOnOff(eid) {
    var e = document.getElementById(eid);
    if (e.style.display == 'block' || e.style.display == 'table-row') {
        e.style.display='none';
    } else {
        /* v mozille bude potreba misto block nastavit table-row */
        e.style.display='block';
    }
}