.nav_b_1 {
	left: 240px;
	top: 187px;
	position: absolute;
	width: 773px;
}
.nav_b_2 {
	position: absolute;
	left: 151px;
	top: 215px;
	width: 660px;
	visibility: visible;
}
.nav_b_3 {
	position: absolute;
	left: 227px;
	top: 234px;
}
.nav_b_ds {

	position: absolute;
	left: 151px;
	top: 215px;
	width: 1160px;
	visibility: visible;
}