这样的代码怎么居中
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/...
<!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"><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<link href="1.css" rel="stylesheet" type="text/css" />
<style type="text/css">
<!--
#B1 {
position: absolute;
left: 100px;
top: 238px;
right: 0px;
bottom: 0px;
width: 787px;
height: 55px;
}
body {
background-image: url(IMG/mbbj.jpg);
background-repeat: no-repeat;
}
#B2 {
position: absolute;
left: 100px;
top: -29px;
width: 808px;
height: 276px; 展开
<html xmlns="http://www.w3.org/1999/xhtml"><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<link href="1.css" rel="stylesheet" type="text/css" />
<style type="text/css">
<!--
#B1 {
position: absolute;
left: 100px;
top: 238px;
right: 0px;
bottom: 0px;
width: 787px;
height: 55px;
}
body {
background-image: url(IMG/mbbj.jpg);
background-repeat: no-repeat;
}
#B2 {
position: absolute;
left: 100px;
top: -29px;
width: 808px;
height: 276px; 展开
1个回答
展开全部
margin：0 auto
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