CSS多行文字垂直居中的两种方法

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<div class="middle-inner">
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.middle-box{display: table; height: 300px;}
.middle-inner{display: table-cell; vertical-align:middle; text-align:center;}

<!--[if lt IE 8]>
<style>
.middle-inner { position: absolute; top:50%;}
.middle-inner p {position: relative; top: -50%}
</style>
<![endif]-->

.middle-box{display: table; height: 300px; border:1px solid #ff0000; width:400px; margin:0 auto; position:relative;}
.middle-inner{display: table-cell; vertical-align:middle; *position:absolute; *top:50%; *left:50%; width:100%; text-align:center;}
.middle-inner p{position:relative; *top:-50%; *left:-50%;}