js实现随机点名小功能

时间:2020-05-16 蒲小若人气:0

本文实例为大家分享了js实现随机点名功能的具体代码，供大家参考，具体内容如下

<!DOCTYPE html> 
<html> 
 <head> 
  <meta charset="UTF-8"> 
  <title></title> 
 </head> 
 <body> 
  <div id="name1"></div> 
  <button id="btn">stop</button> 
   
 </body> 
 <script type="text/javascript"> 
  var flag = true; 
  var str = "张三,李四,王五,马六"; 
  var arr = str.split(","); 
  var interId = setInterval("randName()",100); 
  function randName(){ 
   var rand = Math.floor(Math.random() * arr.length); 
   name1.innerHTML = arr[rand]; 
  }  
  btn.onclick = function (){ 
   if (flag) { 
    btn.innerHTML = "start"; 
    clearInterval(interId); 
    flag = false; 
   } else{ 
     
 
btn.innerHTML = "stop"; 
    interId = setInterval("randName()",100); 
    flag = true; 
   } 
  } 
 </script> 
</html>

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