/* 折り畳み型メニュースクリプト */
i=30;
open_close_flg = new Array(i);
for(j = 0; j < i; j++){ open_close_flg[j] = 0;}

function open_close_cntl(menu_array,menu_id){
    if(open_close_flg[menu_array] == 0){
        if(document.getElementById){
            document.getElementById(menu_id).style.display='block';}
        else{
            document.all(menu_id).style.display='block';}
        open_close_flg[menu_array] = 1;}
    else{
        if(document.getElementById){
            document.getElementById(menu_id).style.display='none';}
        else{
            document.all(menu_id).style.display='none';}
        open_close_flg[menu_array] = 0;}
}

/* キーコードチェックスクリプト */
function pwcheck(){
	pw = prompt("キーコードを入力して下さい","")
	if(pw != ""){
		location.href = pw;
	}
	else{
		alert("パスワードが入力されていません");
		location.href = "index.html";
	}
}

/* ここより下、CSS切り替えスクリプト */
function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);