.left {
	background: url('/images/about_us/left_bk.png');
	background-repeat: repeat-y;
}
.left_top {
	background: url('/images/about_us/left_grad_bk.png');
	background-repeat: no-repeat;
}

.right {
	background: url('/images/about_us/right_bk.png');
	background-repeat: repeat-y;
}
.right_top {
	background: url('/images/about_us/right_grad_bk.png');
	background-repeat: no-repeat;
	text-align: center;
}

.middle {
	background: url('/images/about_us/main_bk.png');
	background-repeat: repeat-y;
	vertical-align: bottom;
}