anchor.diff:        .chart rect:hover {
             fill: #000;
         }
  +      .yTicks {
  +        stroke: #aaa;
  +        stroke-width: 0.5;
  +      }
   
       script
           $(document).ready(function(){
               // d3.js Graph
               var xlab = 30;
  +            var chartw = 940;
               var w = 5.595;
               var h = 120;
   
  
positive.code:                 .attr("width", w)
                  .attr("height", function(d) { return y(d); })
                  .attr("title", function(d){ return d; });
  
              chart.append("line")
                .attr("x1", 0)
  
negative.code:                 .attr("width", w * #{chanFreqLen} - 1)
                  .attr("height", h + xlab);
  
              chart.selectAll(".yTicks")
                  .data(y.ticks(4).slice(0,5))
                  .enter().append("svg:line")
                  .attr("class", "yTicks")
                  .attr("y1", function(d) { return y(d); })
                  .attr("x1", 0)
                  .attr("y2", function(d) { return y(d); })
                  .attr("x2", w * #{chanFreqLen})
  
              chart.selectAll("rect")
                  .data([#{chanFreq}])
                .enter().append("rect")
  