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display: table-cell;
vertical-align: middle; /*ÉèÖÃˮƽ¾ÓÖÐ*/
text-align: center;

/* Õë¶ÔIEµÄHack */
*display:block;
*font-size:175px;/*ԼΪ¸ß¶ÈµÄ0.873£¬200*0.873 ԼΪ175*/
*font-family:Arial;/*·ÀÖ¹·Çutf-8ÒýÆðµÄhackʧЧÎÊÌ⣬Èçgbk±àÂë*/

width:200px;
height:200px;
border:1px solid #eee;
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.box img
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vertical-align: middle;
}
<div class="box">
<img src="http://pics.taobao.com/bao/album/promotion/taoscars_180x95_071112_sr.jpg" mce_src="http://pics.taobao.com/bao/album/promotion/taoscars_180x95_071112_sr.jpg" />
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http://www.planabc.net/2008/05/26/img_vertical_center_solution/
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CSS Handbook½éÉÜ

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body{
 margin:0;
 padding:0;
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