function initEcharts(id,option){
var echart = echartsObj[id];
if(!echart){
echart = echart.init(document.getElementById(id))
echartsObj[id] = echart
}
if(echart && option){
echart.setOption(option)
}
return echart
}
new initEacharts('echart_id',option) //图表配置代码
<div id="echart_id"></div>