A kind of "Lazy Load" plug-in.
<script src="jquery-1.11.3.min.js"></script>
<script src="jquery.lateriser.js"></script>
<img src="placeholder.png" data-src="original-image.jpg" width="640" height="480" class="late-riser">
You can use your original "placeholder" image.
<script>
$(function () {
$('.late-riser').lateRiser();
});
</script>