function zemeOver(id) {
  eval("document.getElementById('cz-zeme').src = 'img/artworks/cz-empty.gif'");
  eval("document.getElementById('cz-vitej').style.display = 'none'");
  eval("document.getElementById('ro-zeme').src = 'img/artworks/ro-empty.gif'");
  eval("document.getElementById('ro-vitej').style.display = 'none'");
  eval("document.getElementById('vitej').style.display = 'none'");
  eval("document.getElementById('" + id + "-vitej').style.display = 'block'");
  eval("document.getElementById('" + id + "-zeme').src = 'img/artworks/" + id + "-fill.gif'");
}

function rozbalSekci(id) {
  eval("document.getElementById('" + id + "-out').style.display = 'none'");
  eval("document.getElementById('" + id + "-in').style.display = 'block'");
  eval("document.cookie = '" + id + "=ano'");
}

function sbalSekci(id) {
  eval("document.getElementById('" + id + "-in').style.display = 'none'");
  eval("document.getElementById('" + id + "-out').style.display = 'block'");
  eval("document.cookie = '" + id + "=ne'");
}

function getCookie(c_name){
  if (document.cookie.length > 0) {
    var c_start = document.cookie.indexOf(c_name + "=");
    if (c_start != -1) { 
      c_start = c_start + c_name.length + 1; 
      var c_end = document.cookie.indexOf(";", c_start);
      if (c_end == -1) c_end = document.cookie.length;
      return unescape(document.cookie.substring(c_start, c_end));
    } 
  }
  return "";
}

// Rozbalovací seznamy --------------------------------------------------------------------



function kontaktKlik(id) {

  var clen = 'clen' + id;

  var obr = 'obr' + id;

  if (eval("document.getElementById('" + clen + "').style.display") == "none") {
    eval("document.getElementById('" + clen + "').style.display = 'block'");
    eval("document.getElementById('" + obr + "').src = 'img/artworks/sbalit.gif'");
    eval("document.getElementById('" + obr + "').alt = 'Sbalit'");
  } else {
    eval("document.getElementById('" + clen + "').style.display = 'none'");
    eval("document.getElementById('" + obr + "').src = 'img/artworks/rozbalit.gif'");
    eval("document.getElementById('" + obr + "').alt = 'Rozbalit'");
  }
}