下載位址：http://bassistance.de/jquery-plugins/jquery-plugin-validation/
在表單的 input element 加上一些 class，定義好這個欄位該有什麼樣的值。例如：required, email, url, etc. (查看完整列表)
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body>
<script type="text/javascript" src="js/jquery-1.7.1.js" charset="utf-8"></script>
<script type="text/javascript" src="js/jquery-validation-1.9.0/jquery.validate.min.js"></script>
<script type="text/javascript" src="js/jquery-validation-1.9.0/localization/messages_tw.js"></script>
<script type="text/javascript" charset="utf-8">
$(document).ready( function(){
$('#commentForm').validate();
});
</script>
<form id="commentForm" class="cmxform" method="POST" action="">
<fieldset>
<legend>A simple comment form with submit validation and default messages</legend>
<p>
<label for="cname">Name</label>
<em>*</em><input id="cname" name="name" size="25" class="required" minlength="2" />
</p>
<p>
<label for="cemail">E-Mail</label>
<em>*</em><input id="cemail" name="email" size="25" class="required email" />
</p>
<p>
<label for="curl">URL</label>
<em> </em><input id="curl" name="url" size="25" class="url" value="" />
</p>
<p>
<label for="ccomment">Your comment</label>
<em>*</em><textarea id="ccomment" name="comment" cols="22" class="required"></textarea>
</p>
<p>
<input class="submit" type="submit" value="Submit"/>
</p>
</fieldset>
</form>
資料來源：http://brooky.cc/2011/08/04/using-jquery-validation-plugin-for-form-validation/
