[Solved]-Highcharts Combo graphs with common legend click-Highcharts

You can use legendItemClick event and then hide element with series index in pie chart like here http://jsfiddle.net/TV8f4/3/

legendItemClick:function(){

                     var index = this.index,
                         chart = this.chart,
                         series = chart.series,
                         len = series.length,
                         pieSerie = series[len-1];

                     pieSerie.data[index].setVisible();

                 }