// JavaScript Document

function swapImage (image) {
	
	var image_over = document.getElementById (image.id+"_over");
	image_over.style.display = 'block';
	image.style.display = 'none';
}

function restoreImage (image_over) {
	var image = image_over.id.slice (0, -5);
	image = document.getElementById (image);
	image_over.style.display = 'none';
	image.style.display = 'block';
}