<!DOCTYPE html>
<html>
<head>
    <style>
        .page-scroller {
            height: 500px;
            width: 500px;
            overflow-y:auto;
            overflow-x: hidden;
            border: 1px solid black;
        }

        .relative {
            position: relative;
            height: 500px;
            width: 100%;
        }
                
        .absolute {
            position: absolute;
            z-index: 1;
            top: 20px;
            left: 20px;
            right: 20px;
            bottom: 20px;
        }

        .scroller {
            overflow-y: auto;
            width: 100%;
            height: 100%;
            background: white;
            border: 1px solid black;
        }

        .relative-content {
            position: relative;
            width: 100%;
            height: 600px;
            background-color: green;
        }
        .content-sizer {
            width: 100%;
            height: 750px;
            background-color: silver;
        }
        
        .scrollbars-hider {
            position: absolute;
            z-index: 2;
            top: 6px;
            left: 458px;
            width: 56px;
            height: 510px;
            background-color: gray;
        }
    </style>
</head>
<body>
    <div class="page-scroller">
        <div class="relative">
            <div class="content-sizer"></div>
            <div class="absolute">
                <div class="scroller">
                    <div class="relative-content"></div>
                </div>
            </div>
        </div>
    </div>
    <div class="scrollbars-hider"></div>
</body>
</html>