getElementsByTagName通过标签名获取元素对象集合

 

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>index</title>
    <style>
        *{
            font-family: 微软雅黑;
        }
    </style>
</head>
<body>
    <h1>aaaaaaaaaaaaaaaaaaaaaaaaaaaa</h1>    
    <h1>aaaaaaaaaaaaaaaaaaaaaaaaaaaa</h1>    
    <h1>aaaaaaaaaaaaaaaaaaaaaaaaaaaa</h1>    
    <h1>aaaaaaaaaaaaaaaaaaaaaaaaaaaa</h1>    
    <h1>aaaaaaaaaaaaaaaaaaaaaaaaaaaa</h1>    
    <h1>aaaaaaaaaaaaaaaaaaaaaaaaaaaa</h1>    
</body>
<script>
hidobjs=document.getElementsByTagName('h1');

for(i=0;i<hidobjs.length;i++){
    hidobjs[i].style.background='#f0f';
}
</script>
</html>

 

 

posted @ 2020-12-27 22:32  大熊童鞋  阅读(234)  评论(0)  编辑  收藏  举报