// Funktionen fuer Rollover (obere Navi)

var menuLen = new Array(6);
var menuAct = new Array(5);
var mainMenuAct = new Array(5);
var mainMenuLen = 5;
menuLen[0] = 6;
menuLen[1] = 4;
menuLen[2] = 5;
menuLen[3] = 6;
menuLen[4] = 3;


function moveCover(menu) {
  document.getElementById("menuCover" + menu).style.visibility = "hidden";
  document.getElementById("menuCover" + menu + "u").style.visibility = "visible";
}

function stopCover(menu) {
  if (!menuAct[parseInt(menu)]) {
    downCover(menu);
  }
}

function downCover(menu) {
    document.getElementById("menuCover" + menu).style.visibility = "visible";
    document.getElementById("menuCover" + menu + "u").style.visibility = "hidden";
}

function boldLink(menu) {
  for (i=0; i<mainMenuLen; i++) {
    if (menuAct[i + 1] && !menuAct[parseInt(menu.substring(0,1))]) {
      downCover((i + 1) + "");
    }
    menuAct[i + 1] = false;
    for (j=0; j<menuLen[i]; j++) {
      document.getElementById((i + 1) + "" + (j + 1)).className = "topnav";
    }
  }
  menuAct[parseInt(menu.substring(0,1))] = true;
  document.getElementById(menu).className = "topnavbold";
}