[Solved]-Make flag visible when the the plot is clicked to show-Highcharts

see this fiddle: http://jsfiddle.net/bbqkv/

make use of the show and hide events to trigger the show and hide methods for the flag series.

plotoptions: {
    series: {
        events: {
            show: function(event) {
                if (this.options.type != 'flags') {
                    series = this.chart.get(this.options.id + 'flags');
                    series.show();
                }
            },
            hide: function(event) {
                if (this.options.type != 'flags') {
                    series = this.chart.get(this.options.id + 'flags');
                    series.hide();
                }
            }
        }
    }
},