jstl标签应用2

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<script type="text/javascript">
 function changePass(){
  var userPass=document.from_editEmail.userPass.value;
  var oldPass=document.from_editEmail.oldPass.value;
  if(oldPass==userPass){
   return true;
  }else{
   alert('原始密码错误，请重新输入');
   document.from_editEmail.oldPass.value='';
   return false;
  }
 }
 function submitEditEmail(){
  if(document.from_editEmail.oldPass.value==''){
   alert('原始密码不能为空');
   return false;
  }else if(!changePass()){
   return false;
  }else if(document.from_editEmail.newEmail.value==''){
   alert('新邮箱不能为空');
   return false;
  }
  var newEmail=document.from_editEmail.newEmail.value;
  if(newEmail.indexOf('@')<1 || (newEmail.indexOf('.')<(newEmail.indexOf('@')+1))){
   alert('邮箱格式不正确');
   return false;
  }
  document.from_editEmail.submit();
 }
</script>
  <div class="l_t_4">
  <form action="user.do" name="from_editEmail" method="post">
   <input type="hidden" name="userAction" value="ediUserEmail"/>
   <div class="c1">　<span class="font1">修改我的注册密码</span></div> 
   <div class="c6" style="padding-left:100px;">
    <div class="lt_con">
     <div class="lt_left">用户名：</div>
     <div class="lt_right">
      <input type="text" name="userName" value="${user.userName}" id="txtUA" class="in"  style="width: 148px"  disabled="disabled"/>
     </div>
    </div>
   </div>
   
   <div class="c6" style="padding-left:100px;">
    <div class="lt_con">
     <input type="hidden" name="userPass" value="${user.userPassword}"/>
     <div class="lt_left">用户密码：</div>
     <div class="lt_right"><input type="password" name="oldPass" id="txtOldPwd" class="in" style="width: 148px" onchange="changePass()" /></div>
    </div>
   </div>
   
   <div class="c6" style="padding-left:100px;">
    <div class="lt_con">
     <div class="lt_left">新邮箱：</div>
     <div class="lt_right">
     <input type="text" name="newEmail" class="in" style="width: 147px" /><br/>
     <span style="color:#f00;font-size:12px;">邮箱格式必须包含'@'和'.'并且不能以'@'开头'@'和'.'之间至少有一个字符</span>
     </div>
    </div>
   </div>

   <div class="lt_con" style="padding-left:150px;">
    <img src="images/bt5[1].gif" onclick="submitEditEmail()" />
   </div> 
  </form>
  </div>