$(function() {
var topBtn = $('#page-top');    
topBtn.hide();
//スクロールが100に達したらボタン表示
$(window).scroll(function () {
　if ($(this).scrollTop() > 100) {
　　topBtn.fadeIn();}
 　　　else { topBtn.fadeOut();
    }
    });
//スクロールしてトップ
    topBtn.click(function () {
    $('body,html').animate({
    scrollTop: 0}, 500);
        return false;
    });
});


$(function() {
var topBtn2 = $('#page-top2');    

//スクロールしてトップ
    topBtn2.click(function () {
    $('body,html').animate({
    scrollTop: 0}, 500);
        return false;
    });
});


$(function(){
     
$(".accordion .st").click(function(){
    $(this).next(".list").slideToggle();
    $(this).toggleClass("on");
    
}); 
});

$(function () {
   
    var headerHight3 = 0;
    $('.sp_anchor a[href^=#]').click(function(){
        var href= $(this).attr("href");
        var target = $(href == "#" || href == "" ? 'html' : href);
        var position = target.offset().top-headerHight3; 
        $("html, body").animate({scrollTop:position}, 550);
        return false;
    });
    
});


$(function(){
    $('.back_grade a[href^=#]').click(function(){
        var speed = 500;
        var href= $(this).attr("href");
        var target = $(href == "#" || href == "" ? 'html' : href);
        var position = target.offset().top;
        $("html, body").animate({scrollTop:position}, speed, "swing");
        return false;
    });
});






function smartRollover() {
    if(document.getElementsByTagName) {
        var images = document.getElementsByTagName("img");
 
        for(var i=0; i < images.length; i++) {
            if(images[i].getAttribute("src").match("_off."))
            {
                images[i].onmouseover = function() {
                    this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));
                }
                images[i].onmouseout = function() {
                    this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
                }
            }
        }
    }
}
 
if(window.addEventListener) {
    window.addEventListener("load", smartRollover, false);
}
else if(window.attachEvent) {
    window.attachEvent("onload", smartRollover);
}
 
 
// cross fade
 
new function(){
  function setRollOver2(){
    if(!document.images){return;}
    var imgs = document.images;
    var insert = [];
    for(var i=0;i<imgs.length;i++){
      var splitname = imgs[i].src.split('_off.');
      if((splitname[1])&&(imgs[i].parentNode.tagName=='A')){
        var rolloverImg = document.createElement('img');
        rolloverImg.src = splitname[0]+'_on.'+splitname[1];
        var alpha = 0;
        rolloverImg.currentAlpha = alpha;
        rolloverImg.style.opacity = alpha/100;
        rolloverImg.style.filter = 'alpha(opacity='+alpha+')';
        rolloverImg.style.position = 'absolute';
 
 
        addEvent(rolloverImg,'mouseover',function(){setFader(this,100);});
        addEvent(rolloverImg,'mouseout',function(){setFader(this,0);});
 
        insert[insert.length] = {position:imgs[i],element:rolloverImg};
      }
    }
    for(var i=0;i<insert.length;i++){
      var parent = insert[i].position.parentNode;
      parent.insertBefore(insert[i].element,insert[i].position);
    }
  }
 
 
  function setFader(targetObj,targetAlpha){
    targetObj.targetAlpha = targetAlpha;
    if(targetObj.currentAlpha==undefined){
      targetObj.currentAlpha = 100;
    }
    if(targetObj.currentAlpha==targetObj.targetAlpha){
      return;
    }
    if(!targetObj.fading){
      if(!targetObj.fader){
        targetObj.fader = fader;
      }
      targetObj.fading = true;
      targetObj.fader();
    }
  }
 
  function fader(){
    this.currentAlpha += (this.targetAlpha - this.currentAlpha)*0.2;
    if(Math.abs(this.currentAlpha-this.targetAlpha)<1){
      this.currentAlpha = this.targetAlpha;
      this.fading = false;
    }
    var alpha = parseInt(this.currentAlpha);
    this.style.opacity = alpha/100;
    this.style.filter = 'alpha(opacity='+alpha+')';
    if(this.fading){
      var scope = this;
      setTimeout(function(){fader.apply(scope)},30);
    }
  }
 
  function addEvent(eventTarget, eventName, func){
    if(eventTarget.addEventListener){
      eventTarget.addEventListener(eventName, func, false);
    }else if(window.attachEvent){
      // IE
      eventTarget.attachEvent('on'+eventName, function(){func.apply(eventTarget);});
    }
  }
 
  addEvent(window,'load',setRollOver2);
 
}


function checkButton(check){
    var btn = document.getElementById('btn');
    var btn_img = document.getElementById('btn_img');
    if (check.checked) {
        btn.removeAttribute('disabled');
        btn_img.className = 'input_btn_on';
    } else {
        btn_img.className = 'input_btn_off';
        btn.setAttribute('disabled', 'disabled');
    }
}

function getParam(name, url) {
    if (!url) url = window.location.href;
    name = name.replace(/[\[\]]/g, "\\$&");
    var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
        results = regex.exec(url);
    if (!results) return null;
    if (!results[2]) return '';
    return decodeURIComponent(results[2].replace(/\+/g, " "));
}