#left_top {
	background: url(../i/bg_left_top_summer.jpg) no-repeat right top;
}
#middle_top {
	background: url(../i/bg_middle_top_summer.jpg) no-repeat top;
}
#bottom_season {
	display: block;
	position: absolute;
	z-index:10;
	margin-top:-70px;
	background: url(../i/bottom_season_summer.png) no-repeat top left;
}