<html>
<head>
    <style>
        body {
            margin: 0;
        }
        .wide {
            width: 2000px;
            height: 10px;
            background-color: silver;
        }
        .origin {
            position: absolute;
            top: 0;
            left: 1200px;
            width: 10px;
            height: 10px;
            background-color: blue;
        }
        
        #lefty {
            position: absolute;
            left: 1000px;
            width: 100px;
            height: 100px;
            background-color: orange;
        }
    </style>
    <script>
    function runTest()
    {
        document.scrollingElement.scrollLeft = 1000;
    }
    
    window.addEventListener('load', runTest, false);
    </script>
</head>
<body>
    <div class="wide"></div>
    <div class="origin"></div>
    <div id="lefty"></div>
    <div id="result">
    </div>
</body>
</html>