错误提示为英文
js都下载到本地了，错误提示为英文；使用慕课的js地址就好使，为什么？
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>表单验证插件</title>
<script type="text/javascript" src="js/jquery-1.11.1.min.js"></script>
<script type="text/javascript" src="js/jquery.validate.js"></script>
<script type="text/javascript" src="js/jquery.validate.messages_cn.js"></script>
<script type="text/javascript" src="js/main.js"></script>
</head>
<body>
<form id="frmV" method="get" action="#">
<div id="divtest">
<div class="title">
<span class="fl">表单验证插件</span>
<span class="fr">
<input id="btnSubmit" type="submit" value="提交" />
</span>
</div>
<div class="content">
<span class="fl">邮箱：</span><br />
<input id="email" name="email" type="text" /><br />
<span class="tip"></span>
</div>
</div>
</form>
</body>
</html>
