<div class="right_liuyan">
 <marquee id="liuyan" scrollAmount=2 width=200 height=300 direction=up >
         <div class="danmu">

         <p>竟然还有文字识别！！！</p>

         </div>

     <br />

     <div class="danmu">

         <p>这家网店的书就是好</p>

         </div>

         <br />

         <div class="danmu">

         <p>为啥都是计算机的书？</p>

         </div>

         <br />

     <div class="danmu">

         <p>还有手机版！！！！！！还有手机版！！！！！</p>

         </div>

         <br />

     </marquee>

     <input id="dan_input" type="text" value="">

     <button onclick="return addDanMu()">添加弹幕</button>

</div>

.danmu{

    background-color:rgb(231, 231, 231);

    border-radius:10px;

    font-size:15px;

    padding:10px 15px;

}