function seltab(id_max, selected) {
  if (! document.getElementById) return;
  for (i = 1; i <= id_max; i++) {
    if (! document.getElementById("mNavi" + i)) continue;
    if (i == selected) {
      document.getElementById("mNavi" + i).style.display = "block";
      setCookie("showamuseum", i);
    } else {
      document.getElementById("mNavi" + i).style.display = "none";
    }
  }
}

function getCookie(item) {
    var i, index, arr;
    arr = document.cookie.split(";");
    for(i = 0; i < arr.length; i++) {
        index = arr[i].indexOf("=");
        if(arr[i].substring(0, index) == item || 
                arr[i].substring(0, index) == " " + item)
            return arr[i].substring(index + 1);
    }
    return "";

}

function setCookie(item, value) {
    document.cookie = item + "=" + value + ";expires=Thu, 1-Jan-2030 00:00:00 GMT; path=/museum;";
}




function seleS() {
  if (!navigator.cookieEnabled) {
    seltab(3, 1);
    return;
  }
  var mNavi = getCookie("showamuseum");
  if (mNavi!="") {
    seltab(3, mNavi);
  } else {
    seltab(3, 1);
  }
}


window.onload = seleS;