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<html xmlns="http://www.w3.org/1999/xhtml">
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<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
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*{ margin:0; padding:0;}
.one{ width:200px; height:200px; background:blue; position:absolute; top:50%; left:50%;margin:-100px 0 0 -100px; color:#FFF;}
p{ margin:0 auto; width:300px; height:28px; line-height:28px;/*line-height:28px;就是使文字垂直居中*/ background:red;}
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<div class="one">这是一个层垂直水平居中与浏览器</div>
<p>段落内文字垂直居中段落内文字垂直居中</p>
</body>
</html>
