.image_full {
	display:block;
	width:100%;
	margin:auto;
}
.image_mobile {
	display: none;
}
@media (max-width: 640px) and (min-width: 320px) {
	.image_full {
		display: none;
	}
	.image_mobile {
		display: block;
		width: 100%;
		margin: auto;
	}
}