html按钮未触发事件到所需图形容器触发到Highchart JS中的不同图形

我在2个不同的div（container1，container2）中有2个图，并且有两组按钮。两组按钮都仅触发图2。当单击图1的按钮时，它应该更改图1；当我单击图2的按钮时，它应该更改图2。但是图1和图2的按钮都触发到图2。仅图2。

JS小提琴代码http://jsfiddle.net/h5t4c8hj/7/

码

 var chart = Highcharts.chart('container', {
    title: {
        text: 'Graph 1'
    },
    subtitle: {
        text: 'plain'
    },
    xAxis: {
        categories: ['Bin1s', 'Bin2', 'Bin3', 'Bin4', 'Bin5', 'Bin6', 'Bin7', 'Bin8', 'Bin9', 'Bin10']
    },
    series: [{
        type: 'column',
        colorByPoint: false,
        data: [22.3, 42.3, 96.4, 29.2, 44.0, 76.0, 35.6, 48.5, 16.4, 92.3],
        showInLegend: false
    }],
    legend: {
        enabled: false
    },
    plotOptions: {
        series: {
            borderWidth: 0,
            dataLabels: {
                enabled: true,
                format: '{point.y:.1f}%'
            }
        }
    },
}, function(chart) {
    $.each(chart.series[0].data, function (i, data) {
        if (data.y >= 70)
            data.update({
                color: 'yellow'
            });
        if (data.y >= 90)
            data.update({
                color: 'red'
            });
    })
});

$('#plain').click(function() {
    chart.update({
        chart: {
            inverted: false,
            polar: false
        },
        subtitle: {
            text: 'Plain'
        }
    });
});

$('#inverted').click(function() {
    chart.update({
        chart: {
            inverted: true,
            polar: false
        },
        subtitle: {
            text: 'inverted'
        }
    });
});

$('#polar').click(function() {
    chart.update({
        chart: {
            inverted: false,
            polar: true
        },
        subtitle: {
            text: 'Polar'
        }
    });
});

 var chart = Highcharts.chart('container1', {
                title: {
                    text: 'Graph 2'
                },
                subtitle: {
                    text: 'Filled %'
                },
                xAxis: {
                    categories: ['id-1', 'id-2', 'id-3', 'id-4', 'id-5']
                },

                series: [{
                    type: 'column',
                    colorByPoint: false,
                    data: [42.4, 71.5, 19.4, 29.2, 44.0],
                    showInLegend: false
                }],
                plotOptions: {
                    series: {
                        borderWidth: 0,
                        dataLabels: {
                            enabled: true,
                            format: '{point.y:.1f}%'
                        }
                    }
                },

            },
                 function (chart) {
                    $.each(chart.series[0].data, function (i, data) {
                        if (data.y >= 70)
                            data.update({
                                color: 'yellow'
                            });
                        if (data.y >= 90)
                            data.update({
                                color: 'red'
                            });
                    })
                });

            //code for color change


            $('#plain1').click(function () {
                chart.update({
                    chart: {
                        inverted: false,
                        polar: false
                    },
                    subtitle: {
                        text: 'Sewage'
                    }
                });
            });

            $('#inverted1').click(function () {
                chart.update({
                    chart: {
                        inverted: true,
                        polar: false
                    },
                    subtitle: {
                        text: 'Inverted'
                    }
                });
            });

            $('#polar1').click(function () {
                chart.update({
                    chart: {
                        inverted: false,
                        polar: true
                    },
                    subtitle: {
                        text: 'Polar'
                    }
                });
            });