function writeMenu(menu_cislo) {menu1.style.visibility="hidden"; menu2.style.visibility="hidden"; if (menu_cislo.style.visibility=="hidden") menu_cislo.style.visibility="visible"; else menu_cislo.style.visibility="hidden"; }
function xMenu() {menu1.style.visibility="hidden"; menu2.style.visibility="hidden"; }
function xMenu0() { }

function writeMenu3(menu_cislo) {menu2.style.visibility="hidden"; menu3.style.visibility="hidden"; if (menu_cislo.style.visibility=="hidden") menu_cislo.style.visibility="visible"; else menu_cislo.style.visibility="hidden"; }
function xMenu3() {menu2.style.visibility="hidden"; menu3.style.visibility="hidden";}

function writeMenu1(menu_cislo) {menu1.style.visibility="hidden"; if (menu_cislo.style.visibility=="hidden") menu_cislo.style.visibility="visible"; else menu_cislo.style.visibility="hidden"; }
function xMenu1() {menu1.style.visibility="hidden"}


function writeHledat() {  hledej2.style.visibility="hidden"; if (hledej2.style.visibility=="hidden") hledej2.style.visibility="visible"; else hledej2.style.visibility="hidden"; }
function xwriteHledat() { hledej2.style.visibility="hidden"; }

function documentPdf() {  x=document.URL; y=x.lastIndexOf('/'); z=x.lastIndexOf('.'); nazev='pdf/'+x.slice(z-6, z)+'.pdf'; return nazev;  }