title: jqplot not triggering"jqplotDataClick" event within backbone.js view
body: <p>I have a jqplot chart as part of a Backbone.js view. The chart and it's data all load fine, but mouse highlighting and click on the chart don't seem to be registered.
  It works fine in the jqplot examples. It is only when I add it to my Backbone.js framework that it stops working.</p>
  
  <p>I have tried using "jqplotDataHighlight" and "jqplotClick" and neither of them trigger an event, <strong>however
  "jqplotDataUnhighlight" works fine</strong>. I can't figure out why one works and the other don't.</p>
  
  <pre><code>//part of Backbone.js View....
          var l2 = [11, 9, 5, 12, 14];    
          var l3 = [4, 8, 5, 3, 6];    
          var l4 = [12, 6, 13, 11, 2]; 
  
          //this event never triggers
          this.$('#plot3').bind('jqplotDataHighlight',         
             function (ev, seriesIndex, pointIndex, data) { 
                 alert('highlight');           
                 $('#info1b').html('series: '+seriesIndex+', point: '+pointIndex+', data: '+data);        
             }); 
  
             //unhighlight event work just as expected  
          this.$('#plot3').bind('jqplotDataUnhighlight',         
                 function (ev) {
                      alert("this worked: unhighlight")            
                      $('#info1b').html('Nothing');        
          });
  
          //chart load fine, showing all data             
          this.$('#plot3').jqplot([l2, l3, l4],{       
                stackSeries: true,       
                showMarker: false,       
                seriesDefaults: {           
                    fill: true       
                },       
                axes: {           
                   xaxis: {               
                        renderer: $.jqplot.CategoryAxisRenderer,               
                        ticks: ["Mon", "Tue", "Wed", "Thr", "Fri"]           
                   }       
                }    
            });
      });
  </code></pre>