// cascadeMetals.js

function swap_image(id,file,colour) {
	if (document.getElementById) {
		img = document.getElementById(id);
		img.src = 'images/gallery' + file + '_thumbnail_' + colour + '.jpg';
	}
}

function swap_gallery_image(file) {
	if (document.getElementById) {
		oldPic = document.getElementById('currentPic');
		oldPic.src = 'images/' + file + '.jpg';
	}
}

/* Preload full-size gallery images */

var gallery_images = new Array();

for (var i = 0; i < 8; i++) {
	gallery_images[i] = new Image();
	gallery_images[i].src = 'images/gallery00' + (i + 1) + '.jpg';
}

/* Preload black & white gallery thumbnail images */

var bw_thumbnail_images = new Array();

for (var i = 0; i < 8; i++) {
	bw_thumbnail_images[i] = new Image();
	bw_thumbnail_images[i].src = 'images/gallery00' + (i + 1) + 'thumbnail_bw.jpg';
}

/* Preload colour gallery thumbnail images */

var colour_thumbnail_images = new Array();

for (var i = 0; i < 8; i++) {
	colour_thumbnail_images[i] = new Image();
	colour_thumbnail_images[i].src = 'images/gallery00' + (i + 1) + 'thumbnail_colour.jpg';
}