//CSS文件
<style type="text/css">
#bj{
width:200px;
height:200px;
border:3px solid red;
text-align:center;
vertical-align:middle;
display:table-cell; //将对象作为表格单元格显示
background:pink;
}
img{
width:150px;
height:150px;
margin:0 auto;
vertical-align:middle;
border:2px solid green;
}
</style>
</head>
//body文件
<body>
<div id="bj">
<img src="11.jpg"/>
</div>
</body>
