         .on("click", (td) ->
                console.log(td)
                markerClick[lastMarker] = 0
-               d3.select("#circle#{lastMarker}").attr("opacity", 0)
+               d3.select("#circle#{lastMarker}").attr("opacity", 0).attr("fill",purple).attr("stroke","none")
                lastMarker = td
                markerClick[td] = 1
-               d3.select(this).attr("opacity", 1))
+               d3.select(this).attr("opacity", 1).attr("fill",pink).attr("stroke",purple))
 
   # select of chromosome for lower LOD detailed curve
   lastChr = randomChr

        .attr("r", 6)
        .attr("fill", purple)
        .attr("stroke", "none")
        .attr("opacity", 0)
        .on("mouseover", ->
               d3.select(this).attr("opacity", 1))

                .on("click", (td) ->
                       console.log(td)
                       markerClick[lastMarker] = 0
                       d3.select("#circle#{lastMarker}").attr("opacity", 0).attr("fill",purple).attr("stroke","none")
                       lastMarker = td
                       markerClick[td] = 1
                       d3.select(this).attr("opacity", 1).attr("fill", pink).attr("stroke",purple)))


  # chr labels
  topsvg.append("g").selectAll("empty")
