.nav_up {
	background: url("../img/arrow-up.png") no-repeat 50% 50%; padding: 7px; width: 50px; height: 50px; right: 20px; bottom: 10px; white-space: nowrap; position: fixed; cursor: pointer; opacity: 0.7; -moz-border-radius: 3px 3px 3px 3px; -webkit-border-top-left-radius: 3px; -webkit-border-top-right-radius: 3px; -khtml-border-top-left-radius: 3px; -khtml-border-top-right-radius: 3px;
}
.nav_down {
	background: url("../img/arrow_down.png") no-repeat 50% 50%; padding: 7px; border: 1px solid rgb(204, 204, 204); left: 70px; width: 20px; height: 20px; bottom: 10px; white-space: nowrap; position: fixed; cursor: pointer; opacity: 0.7; -moz-border-radius: 3px 3px 3px 3px; -webkit-border-top-left-radius: 3px; -webkit-border-top-right-radius: 3px; -khtml-border-top-left-radius: 3px; -khtml-border-top-right-radius: 3px;
}
