//<![CDATA[
  function displayMenu() {
    if (window.document.getElementById('menu').style.visibility == "hidden") {
      window.document.getElementById('menu').style.visibility = "visible";
      window.document.getElementById('spot').style.visibility = "hidden";
      //window.document.getElementById('title').style.margin = "0 0 0 0";
      window.document.getElementById('main_menu').style.backgroundImage = "url(/fileadmin/medias/menu_navigation.jpg)";
    } else {
      window.document.getElementById('menu').style.visibility = "hidden";
      window.document.getElementById('spot').style.visibility = "visible";
      //window.document.getElementById('title').style.margin = "0 0 0 0";
      window.document.getElementById('main_menu').style.backgroundImage = "url(/fileadmin/medias/menu_navigation_2.jpg)";
    }
  }
//]]>