JS实现的DIV块来回滚动效果示例

2019-11-19 17:42:05

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本文实例讲述了JS实现的DIV块来回滚动效果。分享给大家供大家参考，具体如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body><div id="xx" style=" position:relative;left:100px;width:100px;height:50px;border: solid 1px red;">武林网</div><script type="text/javascript">  function ls(){    var p=true;//开关,true开,false关    var xx=document.getElementById('xx');    var xxleft = parseInt(xx.style.left);    var speed = 20;    var t=setInterval(rollRight,speed);    //向左移动    function rollLeft(){      if(p){        xxleft--;        xx.style.left = xxleft+'px';        if(xxleft <=0 ){          clearInterval(t);          t=setInterval(rollRight,speed);        }      }    }    //向右移动    function rollRight(){      if(p){        xxleft++;        xx.style.left = xxleft+'px';        if(xxleft >= 300){          clearInterval(t);          t=setInterval(rollLeft,speed);        }      }    }  }  ls();</script></body></html>

运行效果图如下：