<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head><script type="text/javascript">
function register(){
var s1=$("#t1").val();
var s2=$("#t2").val();
if(s1=="abc" && s2=="123" ){
location.href="testServlet"
}
else (s1==null || s1=="" || s2==null || s2==""){
alert("帐号密码不能为空");
}
else{
alert("帐号密码错误");
}
}
</script>
</head>
<body>
<center>
<h1>用户登录</h1>
<label>姓名:</label>
<input type="text" name="textfield" id="t1"/>
<h1> </h1>
<div>
<label>密码:</label>
<input type="password" name="textfield2" id="t2" />
</div>
<div>
<h1> </h1>
<input type="button" name="Submit" onclick="register();" value="登录" />
<input type="button" name="Submit2" value="注册" />
</div>
</center>
</body>
</html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head><script type="text/javascript">
function register(){
var s1=$("#t1").val();
var s2=$("#t2").val();
if(s1=="abc" && s2=="123" ){
location.href="testServlet"
}
else (s1==null || s1=="" || s2==null || s2==""){
alert("帐号密码不能为空");
}
else{
alert("帐号密码错误");
}
}
</script>
</head>
<body>
<center>
<h1>用户登录</h1>
<label>姓名:</label>
<input type="text" name="textfield" id="t1"/>
<h1> </h1>
<div>
<label>密码:</label>
<input type="password" name="textfield2" id="t2" />
</div>
<div>
<h1> </h1>
<input type="button" name="Submit" onclick="register();" value="登录" />
<input type="button" name="Submit2" value="注册" />
</div>
</center>
</body>
</html>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"
type="text/javascript"></script>
var s2=$("#t2").val();
引用jquery文件。