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                <div id="fixed_right_banner">
    <a href="javascript:void(0)"><img src=""></a>
    <div><img src=""></div>

<div style="height: 10000px;"></div>


                /* フローティングバナーのラップ要素 */
    /* 右端の上から20pxの位置に固定表示 */
    position: fixed;
    top: 20px;
    right: 0;

/* 画像の共通設定 */
#fixed_right_banner > *
    /* 横幅 */
    width: 65px;

/* 2個目以降の画像の上部に余白を作る */
#fixed_right_banner > * ~ * { margin-top: 10px; }

/* リンク要素 */
#fixed_right_banner > a
    /* ブロック要素に変更 */
    display: block;

    /* 透過変更をスムーズにする(任意) */
   -webkit-transition: opacity .2s ease;
   transition: opacity .2s ease;

/* マウスオーバー時の表現 */
#fixed_right_banner > a:hover
    /* 20%透過させる */
    opacity: .8;