//↓#へ移動↓

//↓トップへ戻る↓
$(function() {
    var topBtn = $('#page-top, #cvfix');    
    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();
        }
    });
});


(function (){ 

var colour=["#33FF99","#FFF","#FFFF33"];
var sparkles=50;

var cNum=0;
var x=ox=300;
var y=oy=100;
var swide=window.innerWidth, shigh=window.innerHeight;
var sleft=sdown=0;
var tiny=[], star=[], starv=[], starx=[], stary=[], tinyx=[], tinyy=[], tinyv=[];
window.onload=function() {
  var i, rats, rlef, rdow;
  for (var i=0; i<sparkles; i++) {
    var rats=createDiv(3, 3);
    rats.style.visibility="hidden";
    document.body.appendChild(tiny[i]=rats);
    starv[i]=0;
    tinyv[i]=0;
    var rats=createDiv(5, 5);
    rats.style.backgroundColor="transparent";
    rats.style.visibility="hidden";
    var rlef=createDiv(1, 5);
    var rdow=createDiv(5, 1);
    rats.appendChild(rlef);
    rats.appendChild(rdow);
    rlef.style.top="2px";
    rlef.style.left=0;
    rdow.style.top=0;
    rdow.style.left="2px";
    document.body.appendChild(star[i]=rats);
  }
  sparkle();
}
function sparkle() {
  var c;
  if (x!=ox || y!=oy) {
    ox=x;
    oy=y;
    for (c=0; c<sparkles; c++) if (!starv[c]) {
      star[c].style.left=(starx[c]=x)+"px";
      star[c].style.top=(stary[c]=y)+"px";
      star[c].style.clip="rect(0px, 5px, 5px, 0px)";
      star[c].childNodes[0].style.backgroundColor=star[c].childNodes[1].style.backgroundColor=colour[cNum%colour.length];cNum++;//■修正
      star[c].style.visibility="visible";
      starv[c]=50;
      break;
    }
  }
  for (c=0; c<sparkles; c++) {
    if (starv[c]) update_star(c);
    if (tinyv[c]) update_tiny(c);
  }
  setTimeout(sparkle, 40);
}
function update_star(i) {
  if (--starv[i]==25) star[i].style.clip="rect(1px, 4px, 4px, 1px)";
  if (starv[i]) {
    stary[i]+=1+Math.random()*3;
    if (stary[i]<shigh+sdown) {
      star[i].style.top=stary[i]+"px";
      starx[i]+=(i%5-2)/5;
      star[i].style.left=starx[i]+"px";
    }
    else { star[i].style.visibility="hidden"; starv[i]=0; return;}
  }
  else {
    tinyv[i]=50;
    tiny[i].style.top=(tinyy[i]=stary[i])+"px";
    tiny[i].style.left=(tinyx[i]=starx[i])+"px";
    tiny[i].style.width="2px";
    tiny[i].style.height="2px";
    tiny[i].style.backgroundColor=star[i].childNodes[0].style.backgroundColor;//■2013年版追加
    star[i].style.visibility="hidden";
    tiny[i].style.visibility="visible"
  }
}
function update_tiny(i) {
  if (--tinyv[i]==25) {
    tiny[i].style.width="1px";
    tiny[i].style.height="1px";
  }
  if (tinyv[i]) {
    tinyy[i]+=1+Math.random()*3;
    if (tinyy[i]<shigh+sdown) {
      tiny[i].style.top=tinyy[i]+"px";
      tinyx[i]+=(i%5-2)/5;
      tiny[i].style.left=tinyx[i]+"px";
    }
    else { tiny[i].style.visibility="hidden"; tinyv[i]=0; return;}
  }
  else tiny[i].style.visibility="hidden";
}
document.onmousemove=function (e){ y=e.pageY; x=e.pageX; sdown=window.pageYOffset; sleft=window.pageXOffset;}
function createDiv(height, width) {
  var div=document.createElement("div");
  div.style.position="absolute";
  div.style.height=height+"px";
  div.style.width=width+"px";
  div.style.overflow="hidden";
  return (div);
}
}());




/*****************************
* scroll *
*****************************/
//fixFooter
$(window).scroll(function() { 
    var fixFooter = $("#fixFooter");
    var scroll = $(window).scrollTop() + $(window).height();
    var footer = $("#return_top").offset().top;

    if ($(window).scrollTop() > $(window).height()) { 
        fixFooter.fadeIn(); 
    } else {
        fixFooter.fadeOut();
    }
    if (scroll > footer) { //画面下部からfooterが現れたら
     
        fixFooter.css({
            "position": "absolute", //固定表示を解除する
            "bottom": 0,
        });

    } else {
        fixFooter.css({
            "position": "fixed",
            "bottom": "0",
        });
    }
});