Show loader (gif) image when scroll to specific element using jQuery

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<div id="lblScroll" style="border: 1px solid red;height:100px;width:75%;background-color:antiquewhite;">Scroll for display loader</div>
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<div id="dvImage" align="right" style="display: none;border: 1px solid red;position: fixed;bottom: 0;right: 0;width: 50px;height: 50px;background-color:burlywood;">
    <img src="https://cdnjs.cloudflare.com/ajax/libs/galleriffic/2.0.1/css/loader.gif" alt="Alternate Text" />
</div>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
    $(function () {
        $('#dvImage').hide();
        $(window).scroll(function () {
            var hT = $('#lblScroll').offset().top;
            var hH = $('#lblScroll').outerHeight();
            var wH = $(window).height();
            var wS = $(window).scrollTop();
            if ((wS > (hT - wH)) && (wS < (hT + hH))) {
                $('#dvImage').show();
            } else {
                $('#dvImage').hide();
            }
        });
    })
</script>