var pictureDiv;
var oldPicture;

function resetPicture() {
	pictureDiv = document.getElementById("image");
	pictureDiv.style.backgroundImage = oldPicture;
}

function pictureChange(photo) {	
	pictureDiv = document.getElementById("image");
	if(!oldPicture){ oldPicture = pictureDiv.style.backgroundImage; }
	pictureDiv.style.backgroundImage = "url("+photo+")";
}