jquery.validate使用时遇到的问题

<script src="../js/jquery.js"></script>
<script src="../js/jquery.validate.js"></script>
<script>
 $().ready(function() {
  $("#registerForm").validate();
 });
</script>
 
<form id="registerForm" method="get" action="">
 <fieldset>
  <p>
   <label for="cusername">用户名</label>
   <input id="cusername" name="username" type="text" data-rule-required="true" data-rule-rangelength="[2,10]" data-msg-required="用户名不能为空" data-msg-rangelength="用户名长度必需是2到10个字符">
  </p>
  <p>
   <label for="cpassword">密码</label>
   <input id="cpassword" name="password" type="password" data-rule-required="true" data-rule-minlength="6" data-msg-required="密码不能为空" data-msg-minlength="最少设置6位密码">
  </p>
  <p>
   <label for="cconfirmpassword">确认密码</label>
   <input id="cconfirmpassword" name="confirmpassword" type="password" data-rule-equalTo="#cpassword" data-msg-equalTo="两次密码不一致">
  </p>
  <p>
   <label for="cemail">邮箱</label>
   <input id="cemail" name="email" data-rule-required="true" data-rule-email="true" data-msg-required="邮箱不能为空" data-msg-email="邮箱的格局不准确">
   </input>
  </p>
  <p>
   <label for="chasreferee">有推举人请勾选</label>
   <input type="checkbox" id="chasreferee" name="hasreferee">
  </p>
  <p>
   <label for="creferee">推举人</label>
   <input id="creferee" name="referee" data-rule-required="#chasreferee:checked" data-msg-required="推举人不能为空">
   </input>
  </p>
  <p>
   <input type="submit" value="提交">
  </p>
 </fieldset>
</form>

<script src="../js/jq