       '<button>Remove DataZoom</button>'
                        ].join('');

                        var btns = $(controller).children();
                        $(btns[0]).on('click', function () {
                            option.dataZoom = [{type: 'inside'}, {type: 'slider'}];
                            chart.setOption(option, true);
                        });
                        $(btns[1]).on('click', function () {
                            delete option.dataZoom;
                           