Display characters of a Word (Text) vertically using JavaScript

<div id="dvInput">
    SOLD TO</div>
<div id="dvOutput">
</div>
<script type="text/javascript">
    window.onload = function () {
        var input = document.getElementById("dvInput").innerHTML;
        var arr = input.replace(' ', '').split('');
        var output = "";
        for (var i = 0; i < arr.length; i++) {
            arr[i] = arr[i].replace(' ', '');
            if (arr[i] != '') {
                output += arr[i] + "<br />";
            }
        }
        document.getElementById("dvOutput").innerHTML = output;
    };
</script>