// Display gallery images
	function showImage(imgID) {
		var selImg = document.getElementById(imgID);
		var mainImg = document.getElementById("imgMain");
		var mainCaption = document.getElementById("captionMain");
		mainImg.src = "images/main" + selImg.src.substring(selImg.src.lastIndexOf("/"));
		mainImg.title = selImg.title;
		mainCaption.innerHTML = selImg.title;
	}