兼容IE6 7 8 chrome firefox图片水平垂直居中

<div class="item"><p><img src="http://www.kddev.com/upload/member/22/22_4a37c7c814fbe57010db5b619a92d414.jpg_240x240.jpg"></p></div>

/*图片列表 兼容IE6水平垂直居中*/
/*For Firefox Chrome*/
.photo-list .item{float: left;cursor: pointer;border:1px #eee solid;width:100px;height:100px;table-layout: fixed;overflow:hidden;text-align:center;display:table;float:left;margin-left:20px; margin-top: 20px;position:relative;}
.photo-list .item p{display:table-cell;vertical-align:middle;width:100px;height:100px;}
.photo-list .item img{margin:0 auto;max-width:100px;max-height:100px;}
/*For IE7*/
*+html .photo-list p{position:absolute;top:50%;width:auto;text-align:center;height:auto;}
*+html .photo-list p img{position:relative;top:-50%;left:-50%;}
/*For IE6*/
*html .photo-list p{position:absolute;top:51%;width:100%;text-align:center;height:auto;display:block;}
*html .photo-list p img{position:relative;top:-50%;left:-50%;width:expression(this.width>100?"100px":"auto");height:expression(this.height>100?"100px":"auto");}