for和getElementByTagName配合 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>for和getElementByTagName配合</title>
    <style type="text/css">
        div{width:100px;height: 100px;border:1px solid black;}
    </style>
    <script type="text/javascript">
    window.onload=function(){
        var aDiv=document.getElementsByTagName('div');
        var i=0;
        for(i=0;i<aDiv.length;i++){
            aDiv[i].style.background='red';
        }
    }
    </script>
</head>
<body>
    <div></div>
    <div></div>
    <div></div>
</body>
</html>

 

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posted @ 2017-01-16 11:52  Mr_W_Blog  阅读(145)  评论(0)  编辑  收藏  举报