javascript实现文字无缝滚动效果

本文实例为大家分享了文字无缝滚动效果，供大家参考，具体内容如下

html

<dl id="marquee" class="marquee">
 <dt>
   <ul class="right-content">
     <li>
       <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="orderNum">BKCSHC161014002153</a>
     </li>
     <li>
       <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="orderNum">BKCSHC161014002153</a>
     </li>
     <li>
       <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="orderNum">BKCSHC161014002153</a>
     </li>
     ...
   </ul>
 </dt>
 <dd></dd>
</dl>

js

<script>
   $(function(){
       Marquee("marquee");
   })

//订单滚动
   var Marquee = function(id){
     var container = document.getElementById(id),
     original = container.getElementsByTagName("dt")[0],
     clone = container.getElementsByTagName("dd")[0],
     liLength=original.getElementsByTagName("li").length,
     speed = 55;
     if(liLength<=8){
       return
     }
     clone.innerHTML = original.innerHTML;

var rolling = function(){
       if (container.scrollTop === clone.offsetHeight) {
         container.scrollTop = 0;
       }
       else {
         container.scrollTop++;
       }
     }
     var timer = setInterval(rolling, speed)//设置定时器
     container.onmouseover = function(){
       clearInterval(timer)
     }//鼠标移到marquee上时，清除定时器，停止滚动
     container.onmouseout = function(){
       timer = setInterval(rolling, speed)
     }//鼠标移开时重设定时器
   }    
</script>