Max Left Positioning Test

HTML

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Max Left Test</title>
</head>

<body>
Pos: <span id="status"></span>
<div id="test" style="position:absolute; top:0; left:-1000px">Test</div>
<script type="text/javascript">
var getCumulativeOffset = function (obj) {
    var left, top;
    left = top = 0;
    if (obj.offsetParent) {
        do {
            left += obj.offsetLeft;
            top  += obj.offsetTop;
        } while (obj = obj.offsetParent);
    }
    return {
        x : left,
        y : top
    };
};

var x =0,
    test = document.getElementById("test"),
    status = document.getElementById("status");
    
setInterval(function() {
    test.style.left = (getCumulativeOffset(test).x + 10000) + "px";
    status.innerHTML = test.style.left;
}, 5);
</script>
</body>
</html>