trycss_boxmodel_width_doctype 在线代码实例

实例代码( Tip: 登录后体验更佳 )
运行代码

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<style type="text/css">
    div.ex
    {
    width:220px;
    padding:10px;
    border:5px solid gray;
    margin:0px;
    }
</style>
</head>
<body>
    <img src="250px.gif" width="250" height="1" /><br /><br />
    
    <div class="ex">
        上面线的宽度为 250px 。<br />
        现在本元素的整体宽度也为 250px。
    </div>
    
    <p><b>注意:</b> 在这个例子我们加上了 DOCTYPE 声明(在 html元素前面), 所以它将在任何浏览器中都将正常显示。</p>
</body>
</html>
 
 
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运行结果
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