anchor.diff:        }
         else if( axisFlag == 3 ) {
           // Size
  -        options.xAxis.title.text = 'Energy to travel to';
  +        options.xAxis.title.text = 'Delta-V';
           options.xAxis.type = '';        
         }
   
  -      options.series.push({color: "#AAAAFF", name: "Distance", data: distanceSeries});
  -      options.series.push({color: "#FFAABB", name: "Impact Prob", data: impactSeries});
  +      options.series.push({color: "#AAAAFF", name: "Approach Distance", data: distanceSeries});
  +      options.series.push({color: "#FFAABB", name: "Impact Probability", data: impactSeries});
         if( axisFlag != 1 ) {
  -        options.series.push({color: "#66A2D4", name: "Asteroid Size, x 100m", data: sizeSeries});
  +        options.series.push({color: "#66A2D4", name: "Size, x100m", data: sizeSeries});
         }
         if( axisFlag != 2 ) {
           options.series.push({color: "#FFF730", name: "Orbital Period", data: periodSeries});
         }
         if( axisFlag != 3 ) {
  -        options.series.push({color: "#20E7AC", name: "Energy", data: energySeries});
  +        options.series.push({color: "#20E7AC", name: "Delta-V", data: energySeries});
         }
   
         // alert("data series size: " + distanceSeries.length);
  
positive.code:         xAxis: {
              title: {
                  enabled: true,
                  text: 'Size (m)'
              },
              startOnTick: false,
              endOnTick: false,
              showLastLabel: true
          },
          series: []
      };
  
  
negative.code:                 Switch X-Axis...&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="caret"></span>
                </button>
                <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1">
                  <li role="presentation"><a role="menuitem" tabindex="-1" href="javascript:switchAxis(0)">Approach Date</a></li>
                  <li role="presentation" class="divider"></li>
                  <li role="presentation"><a role="menuitem" tabindex="-1" href="javascript:switchAxis(1)">Size, x100m</a></li>
                  <li role="presentation" class="divider"></li>
                  <li role="presentation"><a role="menuitem" tabindex="-1" href="javascript:switchAxis(2)">Orbit Period</a></li>
                  <li role="presentation" class="divider"></li>
  