DIV,水平居中,垂直居中第一种:全CSS控制,层漂浮(适用于做登陆页面)
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <style type="text/css"> #divcenter{ position:absolute;/*层漂浮*/ top:50%; left:50%; width:300px; height:300px; margin-top:-150px;/*注意这里必须是DIV高度的一半*/ margin-left:-150px;/*这里是DIV宽度的一半*/ background:yellow; border:1px solid red; } </style> </head> <body> <div id="divcenter"> this is a test </div> </body> </html>
第二种:JS + CSS控制,不漂浮(适用于做登陆页面)
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <script type="text/javascript"> function cen(){ var divname = document.all("testdiv"); //居中高度等于页面内容高度减去DIV的高度 除以2 var topvalue = (document.body.clientHeight - divname.clientHeight)/2; divname.style.marginTop = topvalue; } //页面大小发生变化时触发 window.onresize = cen; </script> </head> <body style="height:100%; width:100%; text-align:center;" onload=cen()> <div id = "testdiv" name="testdiv" style="margin:0 auto; border:1px solid red; height:400px; width:400px;"> DIV居中演示 </div> </body> </html>
第三种:最简单适用的一种上下左右都居中,兼容所有浏览器
<div style="position:absolute; top:50%; height:240px;border:1px solid red; margin:0 auto; margin-top:-120px; width:300px; left:50%; margin-left:-150px;"></div>
其他的方法: 纯css完美地解决图片在div内垂直水平居中,兼容IE7.0、IE6.0、IE5.5、IE5.0、FF、Opera、Safari 以下是程序代码
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title></title> <style type="text/css"> .img_v { display:table-cell !important; display:block; position:static !important; position:relative; overflow:hidden; width:400px; height:400px; border:1px solid #000; vertical-align:middle; text-align:center; } .img_v p { display:table-cell !important; display:block; margin:0; position:static !important; position:absolute; top:50%; left:50%; width:400px; margin-left:auto; margin-right:auto; } .img_v img { position:static !important; position:relative; top:auto !important; top:-50%; left:auto !important; left:-50%; } </style> </head> <body> <div class="img_v"> <p><img src="http://www.jb51.net/images/logo.gif"></p> </div> </body> </html>
DIV,水平居中,垂直居中
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