/**
 * @author ariel.alvarez
 */
 var principalImageUrl = '';
function changeImage(image){
	var bigImage = document.getElementById('image');
	principalImageUrl = bigImage.src;
	bigImage.src = image.src;
}

function principalImage(){
	var bigImage = document.getElementById('image');
	bigImage.src = principalImageUrl;
}