function switchImage(index, path) {	
	
	var id_large = imgIdArray[index];
	var id_small = imgIdArray[0];	
	
	imgIdArray[0] = id_large;
	imgIdArray[index] = id_small;
	
	document.getElementById('img_' + index).src = path + "small_img_" + id_small + ".jpg";
	document.getElementById('main_image').src = path + "large_img_" + id_large + ".jpg";		    
}