var charts = [];
        myChart = echarts.init(document.getElementById('main'));
        myChart.setOption(option);
    charts.push(myChart);
 
    myChart = echarts.init(document.getElementById('container1'));
    myChart.setOption(option);
    charts.push(myChart);
 
    window.onresize = function(){
        for(var i = 0; i < charts.length; i++){
            charts[i].resize();
        }
    };