var gComm = 'none';
var gServ = 'none';

function goAR( serv, comm )
{
	var href, img, obj;

//	alert( "gServ: "+gServ+"\nserv: "+serv+"\ngComm: "+gComm+"\ncomm: "+comm );


	if( serv != 'none' ){		// topo.htm
		if( comm != 'none' ){
			if( serv != 'conj' )
				href = "/docs/" + comm + "_" + serv + ".htm";
			else
				href = "/cgi-bin/recent_ar.pl?prod="+comm;
			}
		else{
//			href = serv + ".htm";
			href = "/"+ serv + ".htm";
			gComm = 'none';
			}
		gServ = serv;
		}
	else{				// barra.htm
		if( comm == 'none' ){
			gComm = gServ = 'none';
			return true;
			}
		if ( gServ=='none' || gServ=='serv' || gServ=='conhe'  ){
			gServ = 'none';
			href = comm + ".htm";
			}
		else{
			if( comm == gComm || gComm == 'none' ){
				if( gServ != 'conj' )
					href = "/docs/" + comm + "_" + gServ + ".htm";
				else
					href = "/cgi-bin/recent_ar.pl?prod="+comm;
				}
			else{
				gServ = 'none';
				href = comm + ".htm";
				}
			}
		gComm = comm;
		}

	resetTopoImg( gServ );

	parent.main.location.href = href;
}


function resetTopoImg( serv )
{
	var img, obj;

	// reset all button images
	parent.topo.document.conj.src="/img/b_conj.gif";
	// parent.topo.document.tend.src="/img/b_tend.gif";
	parent.topo.document.ban.src="/img/b_ban.gif";
	parent.topo.document.pre.src="/img/b_pre.gif";
	parent.topo.document.serv.src="/img/b_serv.gif";
	parent.topo.document.conhe.src="/img/b_conhe.gif";

	if ( serv != 'none'  ){		// make selected service button recessed
		gServ = serv;
		img = "/img/b_" + gServ + "_on.gif";
		obj = parent.topo.document[gServ];
		obj.src = img;
		}
}