#header .btn_menu {
	background: url(/astron/img/top/btn_menu_open.png) no-repeat center center;
}

#header .btn_menu.active {
	background: url(/astron/img/top/btn_menu_close.png) no-repeat center center;
}

#header .btn_menu span{
	filter:alpha(opacity=0);
	-moz-opacity: 0;
	opacity: 0;
}

#header .btn_menu span.bar2{
    filter:alpha(opacity=0);
	-moz-opacity: 0;
	opacity: 0;
    
}