// JavaScript Document 北海道社会事業協会


// ツリーメニュー（クリックで出現・隠れる）
chMenu=0;
function BlocHomeShowHide(tName){
tMenu=(document.all)?document.all(tName).style:document.getElementById(tName).style;
if(chMenu)chMenu.display="none";
if(chMenu==tMenu){chMenu=0;
}else{chMenu=tMenu;
tMenu.display="block";}
}







// ページのトップへ
<!--
     //停止位置
//--------------------------------
sc_int=0;
function TopOverPage(){
doc_sctop = document.body.scrollTop;
if(doc_sctop <= stop_point)return;
  if(doc_sctop > (250+stop_point))
     sc_int=50;
  else
     sc_int = (doc_sctop-stop_point)/5;
doc_sctop -= sc_int;
  if(sc_int < 1)
     doc_sctop=stop_point;
scroll(0,doc_sctop);
if(doc_sctop > stop_point)
   setTimeout("page_top()",3);
}
// -->








// スタイルシートのチェンジ（文字のサイズ変更）

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);