@media all and (min-width: 1367px) { 
	div.index_info {
	background-image: url('bg1_1920.jpg');
	height:400px;
	}
	.index_cont {
	height:400px;
	}
	#menudiv {
	background-image: url('menu_1920.jpg');
	}
}

@media all and (min-width: 801px) and (max-width: 1366px) { 
	div.index_info {
	background-image: url('bg1_1366.jpg');
	height:300px;
	}
	.index_cont {
	height:300px;
	}
	#menudiv {
	background-image: url('menu_1366.jpg');
	}
}

@media all and (max-width: 800px) { 
	div.index_info {
	background-image: url('bg1_800.jpg');
	height:300px;
	}
	.index_cont {
	height:300px;
	}
	#menudiv {
	background-image: url('menu_800.jpg');
	}
}