一起使用HIghchart 与EXTJS 抛出异常
界面是这样的界面最大的容器是一个EXTJS 的panel
panel里面是一个tab
我想把highchart放到一个tab中的时候报错了


异常信息
uncaught exception: Highcharts error #13:

                    var tabs = new Ext.TabPanel({
                        renderTo: strspot[a] + '-body',
                        activeTab: 0,
                        tabCls: 'tab-class',
                        items: [{
                            title: '实时数据',
                            html: html,
                        }, {
                            title: '实时曲线',
                            html: '<div id=chart' + a + ' class=tab_kid></div>'
                        }]
                    });


                    var chart = new Highcharts.Chart({
                        chart: {
                            renderto: 'chart' + a,
                            type: 'spline', 
 
                            animation: Highcharts.svg, // don't animate in old IE
                            marginRight: 10,
                            events: {
                                load: function () {

                                    // set up the updating of the chart each second
                                    var series = this.series[0];
                                    setInterval(function () {
                                        var x = (new Date()).getTime(), // current time
                                            y = Math.random();
                                        series.addPoint([x, y], true, true);
                                    }, 1000);
                                } 
 
                            }
                        },
                        title: {
                            text: strspot[a]
                        },
                        xAxis: {
                            type: 'datetime',
                            tickPixelInterval: 150
                        },
                        yAxis: {
                            title: {
                                text: 'Value'
                            },
                            plotLines: [{
                                value: 0,
                                width: 1,
                                color: '#808080' 
 
                            }]
                        },
                        tooltip: {
                            formatter: function () {
                                return '<b>' + this.series.name + '</b><br/>' +
                                Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' +
                                Highcharts.numberFormat(this.y, 2);
                            }
                        },
                        legend: {
                            enabled: false
                        },
                        exporting: {
                            enabled: false
                        },
                        series: [{
                            name: strspot[a], 
 
                            data: (function () {
                                // generate an array of random data
                                var data = [],
                                    time = (new Date()).getTime(),
                                    i;

                                for (i = -19; i <= 0; i++) {
                                    data.push({
                                        x: time + i * 1000,
                                        y: Math.random()
                                    });
                                }
                                return data;
                            })() 
 
                        }]
                    });

[解决办法]
Highcharts error #13
http://www.highcharts.com/errors/13
这里有你要的错误原因，你把Highcharts 部分写在tab 的 afterrender里应该就可以了
原因Highcharts 找不到容器