图像的绝对中心(垂直和水平)

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Chris Coyier

CSS 背景图像技术

html { 
   width:100%; 
   height:100%; 
   background:url(logo.png) center center no-repeat;
}

CSS + 内联图像技术

img {
   position: absolute;
   top: 50%;
   left: 50%;
   width: 500px;
   height: 500px;
   margin-top: -250px; /* Half the height */
   margin-left: -250px; /* Half the width */
}

表格技术

html, body, #wrapper {
   height:100%;
   width: 100%;
   margin: 0;
   padding: 0;
   border: 0;
}
#wrapper td {
   vertical-align: middle;
   text-align: center;
}
<table id="wrapper">
  <tr>
    <td><img src="logo.png" alt="" /></td>
  </tr>
</table>