<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/1.6.4/jquery.min.js"></script>
<style>
input:focus,textarea:focus{
border:1px solid #f00;
background:#fcc;
}
.focus{
border:1px solid #f00;
background:#fcc;
}
</style>
<script>
$(function(){
$(":input").focus(function(){
$(this).addClass("focus");
}).blur(function(){
$(this).removeClass("focus");
});
});
</script>
</head>
<body>
<form action="#" method="post" id="regForm">
<fieldset>
<legend>個人基本信息</legend>
<div>
<label for="username">名稱：</label>
<input id="username" type="text" />
</div>
<div>
<label for="pass">密碼：</label>
<input type="password" id="pass" />
</div>
<div>
<label for="msg">詳細信息：</label>
<textarea id="msg"></textarea>
</div>
</fieldset>
</form>
</body>
</html>