<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<!--
<form action="javascript:alert('hello')" method="post">
<form action="http://www.baidu.com" method="post">
-->
<form action="javascript:alert('hello')" method="post">
Username :<input type="text" name="username" id="username"><br>
Password :<input type="text" name="password" id="pwd"><br>
swimming :<input type="checkbox" name="swimming" value="swimming"><br>
reading :<input type="checkbox" name="reading" value="reading"><br>
<hr>
gender:<input type="radio" name="gender" value="gender"><br>
<input type="gender" value="female"><br>
provide:
<select name="province" id="province" multiple>
<option value="bj">Beijing</option>
<option value="tj">Tianjin</option>
<option value="sh">Shanghai</option>
</select>
<input type="submit" value="login" id="submit">
</form>
</body>
</html>