@media screen and (min-width: 480px) {
	.maDiv {
		background-image: url("img/bg_480.jpg");
	}
}

@media screen and (min-width: 576px) {
	.maDiv {
		background-image: url("img/bg_576.jpg");
	}
}

@media screen and (min-width: 768px) {
	.maDiv {
		background-image: url("img/bg_768.jpg");
	}
}

@media screen and (min-width: 992px) {
	.maDiv {
		background-image: url("img/bg_992.jpg");
	}
}

@media screen and (min-width: 1200px) {
	.maDiv {
		background-image: url("img/bg_1200.jpg");
	}
}