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来源：1-26 编程练习

慕村1994845

2020-07-19 10:57:12

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>setInterval()</title>
        <style type="text/css">
            div{
                width:300px;
                height:300px;
                border:1px solid #333;
                overflow:hidden;
            }
        </style>
    </head>
    <body>
        <input type="button" value="开始" id="start">
        <br><br>
        <div id="text"></div>
        <script type="text/javascript">
           //补充代码
           var start=document.getElementById("start");
           var text=document.getElementById("text");
           start.onclick=function(){
               setInterval(function(){
                   text.innerHTML+="hello ";
               },1000);
           }
        </script>
    </body>
</html>

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