function filterByStatus() {
	var status = document.getElementsByName("status");
	var showStatus;

	// Close info window and remove any relation before updating the markers but only if the new filter affects the current relation
	if( (typeof(source) != "undefined" && !isShown(source[0])) || (typeof(target) != "undefined" && !isShown(target[0])) ) {
		map.closeInfoWindow();
		if( typeof(relationPolyline) != "undefined" ) {
			map.removeOverlay(relationPolyline);
			map.removeOverlay(relationMarker);
		}
		if( typeof(traceRoutePolyLine) != "undefined" )
			map.removeOverlay(traceRoutePolyline);
	}
	if( typeof(source) != "undefined" && isShown(source[0]) && typeof(target) != "undefined" && isShown(target[0])  ) {
		// Make sure the relation gets drawn again if after some filter is reselected 
		if( typeof(relationPolyline) != "undefined" ) {
			map.addOverlay(relationPolyline);
			map.addOverlay(relationMarker);
		}
		if( typeof(traceRoutePolyLine) != "undefined" )
			map.removeOverlay(traceRoutePolyline);
		//selectTestbox(source[0], 0);
		//selectTestbox(target[0], 1);
	}

	// Then only show what we need to.
	for(var i=0; i<status.length; i++) {
		if( status[i].checked ) {
			$(status[i].value+"icon").morph('opacity:1.00');
			for( var tbid in gpsinfo[status[i].value] ) {
				gpsinfo[status[i].value][tbid]["marker0"].pleaseHideLater = false;
				gpsinfo[status[i].value][tbid]["marker0"].show();
				gpsinfo[status[i].value][tbid]["marker1"].pleaseHideLater = false;
				gpsinfo[status[i].value][tbid]["marker1"].show();
				gpsinfo[status[i].value][tbid]["marker2"].pleaseHideLater = false;
				gpsinfo[status[i].value][tbid]["marker2"].show();
				gpsinfo[status[i].value][tbid]["marker3"].pleaseHideLater = false;
				gpsinfo[status[i].value][tbid]["marker3"].show();
			}
		} else {
			$(status[i].value+"icon").morph('opacity:0.25');
			for( var tbid in gpsinfo[status[i].value] ) {
				if( status[i].value != "CUSTOM" ) // Don't hide CUSTOM boxes to avoid strange behaviour.
					gpsinfo[status[i].value][tbid]["marker0"].pleaseHideLater = true;
					gpsinfo[status[i].value][tbid]["marker0"].hide();
					gpsinfo[status[i].value][tbid]["marker1"].pleaseHideLater = true;
					gpsinfo[status[i].value][tbid]["marker1"].hide();
					gpsinfo[status[i].value][tbid]["marker2"].pleaseHideLater = true;
					gpsinfo[status[i].value][tbid]["marker2"].hide();
					gpsinfo[status[i].value][tbid]["marker3"].pleaseHideLater = true;
					gpsinfo[status[i].value][tbid]["marker3"].hide();
			}
		}
	}
	updateSelectBox();
	mMgr.refresh();
}




function addCustom( tbid ) {
	for( statusIt in gpsinfo ) {
		if( gpsinfo[statusIt][tbid] && statusIt != "CUSTOM" ) {
			gpsinfo["CUSTOM"][tbid] = gpsinfo[statusIt][tbid];
		}
	}
	updateCustom();
}

function rmCustom( tbid ) {
	delete gpsinfo["CUSTOM"][tbid];
	updateCustom();
}

function updateCustom() {
	var text = "<p class=\"smallFont\">Testbox in custom list (click to remove): ";
	var count = 0;
	for( tbidIt in gpsinfo["CUSTOM"] ) {
		text += "<a href=\"#\" onClick=\"rmCustom('" + tbidIt + "')\">" + tbidIt + "</a> ";
		count++;
	}
	if( count == 0 )
		text += "None";
	text += "</p>";
	writit(text, "customDiv");
	filterByStatus();
}