ajax用户验证 邮件验证怎么弄啊 怎么把下面的改成动态验证

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ taglib prefix="sx" uri="/struts-dojo-tags"%> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
    <title>user edit</title>
    <sx:head />
    <script type="text/javascript">
    
    
    
    
    
    
dojo.event.topic.subscribe("/save", function(data, type, request) {
    if(type == "load") {
dojo.byId("id").value = "";
dojo.byId("loginName").value = "";
dojo.byId("userPwd").value = "";
dojo.byId("userName").value = "";
dojo.byId("deptId").value = 1;
dojo.byId("sex").value = 1;
dojo.byId("idCard").value = "";
dojo.byId("userAddr").value = "";
}
});


</script>
</head>
<body>  
    <s:form action="save" >
     <s:textfield id="id" name="user.id" cssStyle="display:none"/>
        <s:textfield id="loginName" label="用户名" name="user.loginName"/>
        <s:textfield id="userPwd" label="密码" name="user.userPwd"/>
        <s:textfield id="userName" label="姓名" name="user.userName"/>
        <s:select id="deptId" label="所属部门" name="deptId" list="%{deps}"  /> 
        <s:radio id="sex" name="user.sex" list="#{'1':'男','0':'女'}" label="性别"  />
        <s:textfield id="idCard" label="身份证" name="user.idCard"/>
        <s:textfield id="userAddr" label="住址" name="user.userAddr"/> 
        <s:textfield id="cid" name="contact.id" cssStyle="display:none"/>
        <s:textfield id="mobilephone" label="手机" name="contact.mobilephone"/> 
        <s:textfield id="telephone" label="固话" name="contact.telephone"/>
        <s:textfield id="email" label="E-mail" name="contact.email"/>
        <s:textfield id="qq" label="qq" name="contact.qq"/>    
       <s:submit valuse="提交" />
    </s:form>
   </body>
</html>