<!DOCTYPE html>
<html>
<body>
<div style='height:3000px'>
    <span id="target">Some offscreen test text for testing.</span>
</div>
<script>
    var range = document.createRange();
    range.selectNode(document.getElementById('target'));
    window.getSelection().addRange(range);
    window.scrollBy(0,500);
</script>
</body>
</html>