function showImage (id) {
	
	var elements = document.getElementsByTagName('div');

	for (var i in elements) {
		if (elements[i].id !== undefined && elements[i].id.indexOf('image_') != -1) {
			elements[i].style.display = 'none';
		}
	}

	var e = document.getElementById(id);
	e.style.display = 'block';
}