function RollOver(src, images_folder) {
	var image = document.image_preview;
	var dot_index = src.lastIndexOf(".");
	var image_path = src.substring(0, dot_index);
	var ext = src.substring(dot_index);
	var slash_index = image_path.lastIndexOf("/");
	
	image_path = images_folder + "/" + image_path.substring(slash_index+1);
	image_path = image_path.replace("_thumb", "");
	
	image.src = image_path + "_small" + ext;
}