function selectThumbnail(id)
{
	var source = document.getElementById("thumbnail_" + id);

	var target = document.getElementById("thumbnailSource");
	if(target && source)
	{
		target.src = source.src;
		target.alt = source.alt;

		var caption = document.getElementById("heroCaption");
		if(caption)
		{
			caption.innerHTML = source.alt;
		}
	}
}