.bana-wa{
	padding:10px 0px;
	width:600px;
	margin:0px auto;
}

a.bana{
	background:url(../img/bana_modelhouse.jpg) top left no-repeat;
	width:600px;
	height:117;
	display:block;
}

a:hover.bana{
	background:url(../img/bana_modelhouse.jpg) top right no-repeat;
	width:600px;
	height:117;
	display:block;
}