function changeShopImage(newimage) {
	var mainimage = document.getElementById('productinfomainimage');
	mainimage.src = newimage;
}
function showOrHideAlternative() {
	var alternative_address = document.getElementById('alternative_address');
	var display = alternative_address.style.display;
	if (display == 'none') {
		alternative_address.style.display = 'block';
	}
	else {
		alternative_address.style.display = 'none';
	}
}