代码如下：
import="java.sql.*,java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*,java.net.*,javax.imageio.*,java.io.*" errorpage="" pageencoding="utf-8"%>
nbsp;html>
资源站登录
request.setattribute("decorator", "none");
response.setheader("cache-control","no-cache"); //http 1.1
response.setheader("pragma","no-cache"); //http 1.0
response.setdateheader ("expires", 0); //prevents caching at the proxy server
%>
session.setAttribute("rand",yanzheng);
%>
<script> <br />function check() <br />{ <br /> if(form1.userID.value=="") <br /> { <br /> alert("请输入用户名"); <br /> form1.userID.focus(); <br /> return false; <br /> } <br /> if(form1.pwd.value=="") <br /> { <br /> alert("请输入登录密码"); <br /> form1.pwd.focus(); <br /> return false; <br /> } <br /> if(form1.yanzhengma.value=="") <br /> { <br /> alert("请输入验证码"); <br /> form1.yanzhengma.focus(); <br /> return false; <br /> } <br /> var yan1=session.getAttribute("rand"); <br /> if(form1.yanzhengma.value!=yan1) <br /> { <br /> alert("验证码不正确！"); <br /> form1.yanzhengma.focus(); <br /> return false; <br /> } <br /> if(form1.select.value==2) <br /> { <br /> if ( confirm("你确定要在该电脑创建cookie实现永久登录吗")) { <br /> session.setAttribute("user",form1.userID.value); <br /> session.setAttribute("mima",form1.pwd.value); <br />return true; <br />} <br /> form1.yanzhengma.focus(); <br /> return false; <br /> } <br /> session.setAttribute("user",form1.userID.value); <br /> session.setAttribute("mima",form1.pwd.value); <br /> return true; <br />} <br /> <br /></script>
<script>window._bd_share_config={"common":{"bdSnsKey":{"tsina":"资源站","tqq":"资源站","t163":"资源站","tsohu":"资源站"},"bdText":"资源站","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":"0","bdSize":"16"},"slide": <br /> <br />{"type":"slide","bdImg":"6","bdPos":"left","bdTop":"100"},"image":{"viewList": <br /> <br />["qzone","tsina","tqq","renren","weixin"],"viewText":"分享到：","viewSize":"16"},"selectShare": <br /> <br />{"bdContainerClass":null,"bdSelectMiniList":["qzone","tsina","tqq","renren","weixin"]}};with(document)0 <br /> <br />[(getElementsByTagName('head')[0]||body).appendChild(createElement <br /> <br />('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date <br /> <br />()/36e5)];</script>
预览结果和实际tomcat运行结果截然不同，请问这是为什么，完全两个样子了，怎么解决这个问题？？？？
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回复讨论(解决方案)
是不是用了struct2的主题
div中 样式添加margin:auto;这个试试；
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