<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<script language="javascript">
function on_submit()
{//验证数据的合法性
if (form1.username.value == "")
{
alert("用户名不能为空，请输入用户名！");
form1.username.focus();
return false;
}
if (form1.userpassword.value == "")
{
alert("用户密码不能为空，请输入密码！");
form1.userpassword.focus();
return false;
}
}
</script>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>用户登录</title>
</head>
<body>
<table aligin="center">
<form name="form1" method="post" action=" station.jsp " onsubmit="return on_submit()">
<tr aligin="center">
<td>
用户登录
</td>
</tr>
<tr aligin="center">
<td>
请输入用户名：<input type="text" name="username" size="20">
</td>
</tr>
<tr aligin="center">
<td>
请输入密码： <input type="password" name="userpassword" size="20">
</td>
</tr>
<tr aligin="center">
<td>
<input type="submit" value="提交" name="B1">
<input type="reset" value="全部重写" name="B2">
</td>
</tr>
</form>
</table>
</body>
</html>
