/*
□ サイト内検索
--------------------------------------------------------------------------	 */
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;
    }
  }
}

/*
□ 文字サイズ変更
--------------------------------------------------------------------------	 */

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);



//クッキーの有効期限設定
var days = 10;

//ページが読み込まれたときのCSS切り替え
function cookie_css(){
   cookie_css_title = read_cookie("NowCSS");
   selectcss(cookie_css_title);
}


//クッキー設定（set_cookie）
function set_cookie(cook_name,value_str,exp_d){
   if(exp_d == 0){
      expire_text = "";
      expire_day = "";
   }
   else{
      expire_day = new Date();
      expire_day.setTime(expire_day.getTime() + (exp_d * 24 * 60 * 60 * 1000));
      expire_day = expire_day.toGMTString();
      expire_text = "expires=";
   }
   document.cookie = cook_name + "=" + escape(value_str) + "; " + expire_day;
}

//クッキー読み込み（read_cookie）
function read_cookie(strings){
   cookie_data=document.cookie+";";
   first_pos=cookie_data.indexOf(strings,0);
   if(first_pos!=-1){
      first_pos += (strings.length+1);
      end_pos=cookie_data.indexOf(";",first_pos);
      value=cookie_data.substring(first_pos,end_pos);
      return(unescape(value));
   }
   return("");
}