      .attr("height", hInner)
      .attr("width", botLwInner)
      .attr("class", "innerBox")
+     .style("pointer-events", "none")
 
   botsvg.append("rect")
      .attr("x", botLw+pad.left)

       .attr("class", "thickline")
       .attr("id", "detailedLod")
       .attr("stroke", "blue")


  # select of chromosome for lower LOD detailed curve
  lastChr = randomChr
  topsvg.select("#rect#{randomChr}").attr("fill", "#E9CFEC")
  chrRect.on("click", (d) ->
             d3.select(this).attr("fill", "#E9CFEC")
             topsvg.select("#rect#{lastChr}").attr("fill", chrColor[lastChr]) if lastChr != 0
             lastChr = d
             botsvg.select("path#detailedLod")
                .transition().duration(0)
                .attr("d", botlodcurve(d)(data.lod[d].pos)))


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

     .attr("height", hInner)
     .attr("width", wInner)
     .attr("class", "outerBox")
     .style("pointer-events", "none")

  botsvg.append("rect")
     .attr("x", pad.left)
