登录界面如何实现固定账号密码登陆成功之后自动跳转到指定网页

【主页登录代码】
<!DOCTYPE html>
<html>
    <head>
        <title>登陆页面</title>
         <meta charset="utf-8">
        <meta name="format-detection" content="telephone=no">
        <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no">
        <meta name="apple-mobile-web-app-capable" content="yes">
        <meta name="apple-touch-fullscreen" content="yes">
        <meta http-equiv="Access-Control-Allow-Origin" content="*">
        <link href="css/login.css" type="text/css" rel="stylesheet">
        <link href="css/global.css" type="text/css" rel="stylesheet">
        <script type="text/javascript">
</script>
    </head>
    <body>
 <input type="text" id="username"/>
     <input type="password" id="password"/>
     <input type="button" onclick="login()" value="登录"/>        <div class="login">
            <div class="login-title"><p>狼帮加密技术专区</p>
                <i></i>
            </div>
            <form method="post" action="success.html">
            <div class="login-bar">
                <ul>
                    <li><img src="images/login_user.png"><input type="text" class="text" placeholder="请输入用户名" /></li>
                    <li><img src="images/login_pwd.png"><input type="password" class="psd" placeholder="请输入确认密码" /></li>
                </ul>
            </div>
            <div class="login-btn">
                <button class="submit" type="submit">登陆</button>
                <a href="register.html"><div class="login-reg"><p>本专区属于狼帮加密技术专区</p></div></a>
            </div>
            </form>
        </div>    </body>
</html>
【登陆成功跳转网页代码】
<!doctype html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
    <title>狼帮加密技术专区</title>
   
<div>
    <p>
        <br/>
    </p>
    <section class="editor">
        <section style="border:none;border-style:none;margin: 5px 0;text-align:center;">
            <span class="" style="width: 0px; height: 0px; border-style: solid; border-width: 1.5em 1em 1em; border-color: rgb(58, 188, 255) transparent transparent; display: inline-block;"></span><span class="96wx-bdc" style="width: 0px; height: 0px; border-style: solid; border-width: 1.3em 0.8em 0.8em; border-color: rgb(58, 188, 255) transparent transparent; margin: 0px auto; display: block;"></span><span class="96wx-bdc" style="padding: 0.5em; border: 1px solid rgb(58, 188, 255); border-radius: 50%; display: inline-block;"><img class="96wx-img" data-wxsrc="https://mmbiz.qlogo.cn/mmbiz/wyice8kFQhf67svzOhb3mluByxAgJMQ0EwR1ysKKYyrqVZVkJ3ZibxZx4eHyZXAKXvicKAs2mhN0ia4D7W7Qs1CR7A/0?wx_fmt=png" style="width: 14em;height: 14em; border-radius: 50%; display: block;" src="http://buluo.lanrenmb.com/bj/images/tuwen/17062605.jpg"/></span><span style="padding: 0.5em 0;font-size: 1.25em;display: block;"><section style="padding: 0 0.5em;display: inline-block;">
                <p style="margin: 0">
                    面朝大海&nbsp;|&nbsp;春暖花开
                </p>
                <p style="margin: 0">
                    <br/>
                </p>
                <p style="margin: 0">
                    <span style="color: rgb(255, 0, 0);">本专区为狼帮专属加密内容，正在升级！</span>
                </p>
                <p style="margin: 0">
                    <span style="color: rgb(255, 0, 0);">敬请期待。</span>
                </p>
            </section></span>
        </section>
    </section>
</div>
【JS文件 】
【login.js】
window.onload=function(){
    var aInput=document.getElementsByTagName('input');
    var oUser=aInput[0];
    var oPwd=aInput[1]
    var aI=document.getElementsByTagName('i')[0];
    
    
    
    //用户名检测
    
    oUser.onfocus=function(){
        aI.innerHTML='';
        oUser.removeAttribute("placeholder");
    }
    
    oUser.onkeyup=function(){
        
    }
    
    oUser.onblur=function(){
        var tel = /1[3|4|5|7|8][0-9]\d{8}$/;
        if(!tel.test(this.value)){
            aI.innerHTML='';
        }else if(this.value==""){
            aI.innerHTML='';
        }
    }
    
    //密码检测
    
    oPwd.onfocus=function(){
        if(oUser.value==""){
            aI.innerHTML='';
        }
        oPwd.removeAttribute("placeholder");
    }
    oPwd.onblur=function(){
        if(this.value==""){
            aI.innerHTML='';
        }
        oPwd.setAttribute("placeholder");
        oPwd.style.placeholder='';
    }}
【register.js】
// 文本输入长度限制
function checkLength(obj,minlength,maxlength) {
var len = obj.value.length + (obj.value.match(/[^\x00-\xff]/g) || "").length;
if(typeof(maxlength) != "undefined"){
if (len > maxlength || len < minlength) {
alert("用户名长度控制在 3 - 12字节");
}
}else{
if(len < minlength){
alert("密码不少于6位");
}
}
}
function submit() {
var psw = document.getElementById("psw").value;
var username = document.getElementById("psw").value;
if(psw!="123" && username!="che"){
alert("用户名或密码错误");
}else{
登陆
}
}
<input id="psw" type="password" onblur="checkLength(this,6); value=value.replace(/[^a-z\d]/ig,'')" />
<input id="username" type="text" onblur="checkLength(this,3,16); " />
求大师指教如何如何修改成只能由账号admin密码admin登录跳转指定页面！非常感谢！！