function chBg(jmeno, evt) {
// change background color by the menu


    elemOver = "#ffffff";
    elemOut = "#e2e2e2";
    elem = document.getElementById(jmeno);

    if (evt.type == 'mouseover') {
        elem.style.backgroundColor = elemOver;
    }

   if (evt.type == 'mouseout') {
        elem.style.backgroundColor = elemOut;
    }
}

function Opener(a) {
// otevrit nove okno 
msgWindow=window.open("/" + a + ".htm","displayWindow","menubar=yes,scrollbars=no,scroll=no,status=no,WIDTH=680,HEIGHT=445,screenX=10,screenY=10,top=10,left=10")
}