<!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>无标题文档</title>
</head>
<body>
<style type="text/css">
body{ font:12px/1.5 arial;}
div{ padding:2px;}
input,textarea{ border:1px solid #888;}
.focus{ border:1px solid #f00; background:#fcc;}
</style>
<form action="" method="post">
<fieldset>
<legend>个人基本信息</legend>
<div>
<label for="username">名称:</label>
<input id="username" type="text" value="名称" />
</div>
<div>
<label for="pass">密码:</label>
<input id="pass" type="password" value="密码" />
</div>
<div>
<label for="msg">详细信息:</label>
<textarea id="msg" rows="2" cols="20">详细信息</textarea>
</div>
</fieldset>
</form>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script>
$(function () {
$(":input").focus(function () {
$(this).addClass("focus");
if ($(this).val() == this.defaultValue) {
$(this).val("");
}
}).blur(function () {
$(this).removeClass("focus");
if ($(this).val() == '') {
$(this).val(this.defaultValue);
}
});
});
</script>
</body>
</html>
