大神们 帮帮我吧

Question

<div id="content" class="global_module">
<h3>用户注册</h3>
    <form id="regform" method="post" action="#">
    <div>
      <span>用户名：</span>
      <input type="text" id="username"/>
      <div class="msg_box">
         <span id="usernameTip"></span>
      </div>
    </div>
    <div class="divContainer">
      <span id="pass">密码：</span>
      <input type="password" id="userpass"/>
      <div class="msg_box">
         <span id="userpassTip"></span>
      </div>
    </div>
    <div class="divContainer">
      <span id="repass">重复密码：</span>
      <input type="password" id="userpass2"/>
      <div class="msg_box">
         <span id="userpassTip2"></span>
      </div>
    </div>
     <div class="divContainer"> 
      <span id="age">年龄：</span>
      <input type="text" id="userage"/>
      <div class="msg_box">
         <span id="userageTip"></span>
      </div>
    </div>
    <div class="divContainer">
      <span id="identify">身份证号：</span>
      <input type="text" id="useridentify"/>
      <div class="msg_box">
         <span id="useridentifyTip"></span>
      </div>
    </div>
    <div class="divContainer">
      <span id="email">Email：</span>
      <input type="text" id="useremail"/>
       <div class="msg_box">
         <span id="useremailTip"></span>
      </div>
    </div>
    <div class="divContainer">
    <input type="submit" value="注册" id="register"/>
    </div>
    </form>
</div>
用jquery  写成下面图片的样式   看到的帮帮吧

Answer 1

http://www.doc88.com/p-480421187720.html 
这个插件可以满足你，有效果，要看到文档最后啊

Answer 2

你那个是用JQUERY validation写的表单验证插件，作者好像叫猫冬，去搜吧。

Answer 3

focu  和 blur  事件就可以实现
剩余的自己写