// aktivni prvek menu
var active;
// adresar s pozadima
var backUrl;

// nastavi adresar k obrazkum
function setBg( dir ) {
  backUrl = dir;
}

// zobrazi blok
function show( tmp ) {
  document.getElementById(tmp).style.display = 'block';
}

// skryje vsechny bloky
function hideall() {
  document.getElementById('mnhbl').style.display = 'none';
  document.getElementById('ohbl').style.display = 'none';
  document.getElementById('nhblsd').style.display = 'none';
  document.getElementById('mcrsz').style.display = 'none';
  document.getElementById('mcrmz').style.display = 'none';
}

// nastavi pozadi prvku na hover
function hoveron( tmp ) {
  // nastavi aktivni prvek (kvuli hoveru pozadi)
  active = tmp;
  document.getElementById("s_"+tmp).style.background = "url("+backUrl+"/template/images/header_menu_"+tmp+"_h.jpg) left top no-repeat";
}

// nastavi polozce obycejne pozadi
function hoveroff( tmp ) {
  document.getElementById("s_"+tmp).style.background = "url("+backUrl+"/template/images/header_menu_"+tmp+".jpg) left top no-repeat";
}

// nastavi vsechny pozadi na zakladni
function hoveroffall() {
  document.getElementById('s_mnhbl').style.background = "url("+backUrl+"/template/images/header_menu_mnhbl.jpg) left top no-repeat";
  document.getElementById('s_ohbl').style.background = "url("+backUrl+"/template/images/header_menu_ohbl.jpg) left top no-repeat";
  document.getElementById('s_nhblsd').style.background = "url("+backUrl+"/template/images/header_menu_nhblsd.jpg) left top no-repeat";
  document.getElementById('s_mcrsz').style.background = "url("+backUrl+"/template/images/header_menu_mcrsz.jpg) left top no-repeat";
  document.getElementById('s_mcrmz').style.background = "url("+backUrl+"/template/images/header_menu_mcrmz.jpg) left top no-repeat";
}

// pri najeti mysi zmeni bg na hover
function mouseOn( tmp ) {
    document.getElementById("s_"+tmp).style.background = "url("+backUrl+"/template/images/header_menu_"+tmp+"_h.jpg) left top no-repeat";
}

// pri odjeti mysi nastavi klasicke bg pokud neni prvek aktivni
function mouseOff( tmp ) {
  if (active != tmp)
    document.getElementById("s_"+tmp).style.background = "url("+backUrl+"/template/images/header_menu_"+tmp+".jpg) left top no-repeat";
}