title: Highcharts - fire legendItemClick event
body: <p>I want to fire the same event that it's fired when you select an item legend but from an external html button. Is it possible?</p>
  
  <p>I've created a jsfiddle to show it: <a href="http://jsfiddle.net/YcJF8/1/">http://jsfiddle.net/YcJF8/1/</a>  . </p>
  
  <pre><code>$('#container').highcharts({
                      chart : {
                          type : 'spline',
                      },
  
                      xAxis : {
                          categories : ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
                      },
  
                      series : [{
                          data : [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4],
  
                      }],
  
                      plotOptions : {
                          series : {
  
                          cursor : 'pointer',
                      }
                  },
  });
  
  $('#button').click(function() {
          alert("Fire legenditemclick event");
  });
  </code></pre>
  
  <p>In this jsfiddle, I have a button and I want that when I click the button it fires an event or something that chart detects and acts like item legend (series 1) was clicked. </p>
  
  <p>Thank you very much</p>