placeholder
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>placeholder</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
<form action="http://www.cnblogs.com/peter-Blog" method="get">
账号:<input id="name" name="name" type="text" placeholder="请输入账号" /><br />
密码:<input id="password" name="password" type="text" placeholder="请输入密码" /><br />
<input type="submit" value="注册" />
<input type="submit" value="修改" />
</form>
</body>
</html>
截图如下:


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