JavaScript201708/WEEK3/DAY3/2-offet.html at master · code-brewer/JavaScript201708 · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>珠峰培训</title>
    <style>


        #outer {
            margin: 20px;
            width: 300px;
            height: 300px;
            background: green;
            border: 10px solid black;
        }

        #inner {
            margin: 20px;
            width: 200px;
            height: 200px;
            background: red;
            border: 10px solid black;
        }

        #center {
            margin: 20px;
            width: 100px;
            height: 100px;
            background: orange;
            border: 10px solid black;
        }
    </style>
</head>
<body>
<div id="outer">
    <div id="inner">
        <div id="center"></div>
    </div>
</div>

<script src="js/utils.js"></script>
<script src="js/2-1.js"></script>
</body>
</html>