firefox下也有报错?报错

是什么情况下报的错？在示例里？这个是我用Chrome能正常运行的代码，IE11报之前的错误，FireFox现在就看到有这个错误。我写的代码比较简单，基本上跟测试代码类似。我重新贴一下源代码吧。this是什么对象？有定义_picking吗？Layer3D.js(第196行，第8列)<preclass="brush:js;toolbar:true;auto-links:false;">require.config({packages:[{name:'echarts-x',location:'lib/echarts-x/src',main:'echarts-x'},{name:'echarts',location:'lib/echarts/src',main:'echarts'},{name:'zrender',location:'lib/zrender/src',main:'zrender'},{name:'qtek',location:'lib/qtek/src',main:'qtek.amd'}]});require(['echarts','qtek/core/request','echarts/component/dataRange','echarts-x','echarts-x/chart/map3d'],function(echarts,request){varchart=echarts.init(window.top.frames["iFramePageContent"].document.getElementById(divName));varoption={tooltip:{formatter:'{b}'},series:[{type:'map3d',mapType:'world',baseLayer:{backgroundColor:'',backgroundImage:'images/earth.jpg',quality:'low'},surfaceLayers:[{type:'texture',distance:3,image:'images/clouds.png'}],itemStyle:{normal:{label:{show:true},borderWidth:1,borderColor:'yellow',areaStyle:{color:'rgba(0,0,0,0)'}}},data:[{}]}]};chart.setOption(option);chart.on('click',PortalThreeDMap.ThreeDMapClick);});