效果：
代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
.box{
width:300px;
height:200px;
border:1px solid #ccc;
/*position: absolute;
left:0;
right:0;
top:0;
bottom:0;
margin: auto;*/
margin: 100px auto;
text-align: center;
}
h1{
width:150px;
height:60px;
line-height: 60px;
text-align: center;
font-size: 30px;
background-color: red;
margin: 10px auto;
}
button{
width:100px;
height:40px;
background-color: dodgerblue;
border:0;
font-size: 24px;
color:#fff;
}
</style>
</head>
<body>
<div class="box">
<h1></h1>
<button>开始</button>
<button>停止</button>
</div>
<script>
var h1=document.getElementsByTagName('h1')[0];
var btn=document.getElementsByTagName("button");
var arr=["苏晨旭","张志阳","小明","社会坤哥","药","敬珍","锦涛","网管","社会辰哥","渣男","雪","宝贝曼","大个","睡神","龙爷","英儿","东北娃","珂珂","黄花大闺女","狗蛋","狗子","天娇","志强","晋玮","海涛","迈姐","新凤","环姐","二狗"];
var ind=ranFun(0,arr.length-1)
h1.innerHTML=arr[ind];
var timer;
btn[0].onclick=function(){
clearInterval(timer)
timer=setInterval(function(){
h1.innerHTML=arr[ranFun(0,arr.length-1)]
},100)
}
btn[1].onclick=function(){
clearInterval(timer)
}
function ranFun(a,b){
return Math.floor(Math.random()*(b-a+1)+a)
}
</script>
</body>
</html>
