probelm to highlight part of suburst

[Maitep]

Hi everyone I have problem with my sunburst

this is my function to paint my chart

function render(items){
  var root = items;
  var gs = svg.selectAll("g").data(partition.nodes(root));
  var g = gs.enter().append("g")
    .on("mouseover", mostrar)
    .on("mouseout", ocultar)
    .call(function(d){
      total_jobs = total(items.children);
      tooltip.html("<div class=title_chart>Hours</div><div class=total_job>"+ total_jobs.toLocaleString() +"</div>");
    })
    .on("click", click);
  var path = g.append("path").style("opacity", 1);


  gs.select("path")
    .style("fill", function(d){
      if (d.depth != 0)
        return color((d.children ? d : d.parent).name);
      else
        return "transparent";
    })
    .transition().duration(500)
    .attr("d", arc);
    if (path.node() != null)
      totalSize = path.node().__data__.value;


  gs.exit().transition().duration(500).style("fill-opacity", 1e-6).remove();
}

I use the function ucultar  and mostrar, when I move over the sunburst

I want to highlight the area where I am, and opacity the rest I did this with this...

function mostrar(d){
  d3.selectAll("#cpu_hour path")
    .style("opacity", 0.3);
  var sequenceArray = getAncestors(d);
  svg.selectAll("#cpu_hour path")
    .filter(function(node) {
      return (sequenceArray.indexOf(node) >= 0);
    })
    .style("opacity", 1);  


  tooltip.html(format_description(d));  
  return tooltip.transition()
    .duration(50)
    .style("opacity", 0.9);
}

when I am outside of my sunburst I want that again the opacity is 1, so I see all the sunburst.

And my problem is here, how to detect that I am outside the sunburst? and other thing when I move between the different part of my sunburst this function 

.on("mouseout", ocultar)

Always call, how to avoid this ... because this  call do that the opacity turn on 1 when I am inside the sunburst

function ocultar(d){

  if (num_click == 1){
    tooltip.html(format_description_short(d));
    // hightlight()
  }else{
    if (num_click == 2){
      tooltip.html(format_description_short(d));
      //hightlight()
    }else{
      tooltip.html("<div class=title_chart>Cpu Hours</div><div class=total_job>"+ total_jobs.toLocaleString() +"</div>");
      tooltip.transition()
        .duration(50)
        .style("opacity", 0.9);
        var sequenceArray = getAncestors(d);
        var elemento = svg.selectAll("#cpu_hour path")
        .filter(function(node) {
          return (sequenceArray.indexOf(node) >= 0);
        })
        // if (elemento[0].length == 0){
        //   hightlight()
        // }
    }
  }
}

Thanks in advances!