<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
</head>
<body>
<input type="hidden" value="链接已失效" id="err">
<input type="hidden" value="" id="link">
<div style="display: block;width: 100%;height: 100%;margin: 30% auto;text-align: center;">
    <a href="" target="_self">
        <button style="display: inline-block;border:0px;width: 30%;height: 100px;background: #4dc86f;border-radius: 4px;
    font-size: 32px;text-align: center;color: #fff;line-height:100px;vertical-align: middle;cursor: pointer;">立即跳转</button>
    </a>
</div>

<script>
    window.onload = function () {
        var err = $("#err").val();
        var link = $("#link").val();
        if (err != undefined && err != '') {
            alert(err);
        } else {
            location.href = link;
        }
    }
</script>
</body>
</html>