//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; //將對(duì)象作為表格單元格顯示

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>

!DOCTYPE>中加入w3c標(biāo)準(zhǔn)申明，如：
!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
html xmlns="http://www.w3.org/1999/xhtml">