[SkyLight]

<div id="input_container" style="height: 150px; border: solid 1px black; padding: 5px;">
	<input id="sample_image" type="text" value="url" />
</div>

<script type="text/javascript">
document.onclick = function(){
	var image = document.getElementById("sample_image").value;
	var elem = document.getElementById('input_container');
	elem.style.backgroundImage = "url(" + image +")";
}
</script>