545645645645.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        html,body{
            height: 100%;
            margin: 0;
            padding: 0;
        }
    </style>
</head>
<body id="body">

</body>
</html>
<script>
    console.log(document.documentElement.clientHeight);
     var oldurl ;
     var str='http://192.168.1.17/static/login/index.html?endtype=1&amp;clientversion=2018010800&amp;companyid=10193&amp;companydomain=xxwjy&result=2';

    oldurl=str.replace(/\&amp;/g,'&');

    console.log(oldurl);
</script>