function objekt_omOverOut (objekt, backgroundColor, fontWeight) {
  document.getElementById(objekt).style.backgroundColor = backgroundColor;
  document.getElementById(objekt).style.fontWeight = fontWeight;
}

function foto_omOver(obrazek) {
  document.getElementById(obrazek).style.borderColor = "Blue";
  document.getElementById(obrazek).border = 3;
  document.getElementById(obrazek).style.margin = 0;
}

function foto_omOut(obrazek) {
  document.getElementById(obrazek).style.borderColor = "Black";
  document.getElementById(obrazek).border = 1;
  document.getElementById(obrazek).style.margin = 2;
}

function bgcolor_omOverOut(item, item_color, active, active_color) {
  var itemId = document.getElementById(item);
  itemId.style.backgroundColor = item_color;

  var activeId = document.getElementById(active);
  activeId.style.backgroundColor = active_color;
}

function lang_omOver(obr_rybicka, odkaz) {
  document.getElementById(obr_rybicka).src = 'obr/main/rybicka2_hover.gif';
  document.getElementById(odkaz).style.color = '#ff0';
  document.getElementById(odkaz).style.textDecoration = 'underline';
}

function lang_omOut(obr_rybicka, odkaz) {
  document.getElementById(obr_rybicka).src = 'obr/main/rybicka2.gif';
  document.getElementById(odkaz).style.color = '#87c2c2';
  document.getElementById(odkaz).style.textDecoration = 'none';
}

function menu_omOver(odkaz) {
  document.getElementById(odkaz).style.textDecoration = 'underline';
}

function menu_omOut(odkaz) {
  document.getElementById(odkaz).style.textDecoration = 'none';
}

function menu_onClick(href) {
  window.open(href, "_self");
}