IE Compatibility() Chart Id is same as a JavaScript variable name. Variable n

 FusionCharts.js报 #25081843:IECompatibility() Chart Id is same as a JavaScript variable name. Variable naming error. Please use unique name for chart JS variable, chart-id and container id.

错误代码：

var chart = new FusionCharts("/fusionchartsTest/FusionCharts/RealTimeLine.swf?S=FUSIONCHARTS.COM", "chartTest", "550", "390", "0", "1" );

chart.setDataURL("/fusionchartsTest/RTLine.xml");
 chart.render("chartdiv");   

解决办法：

var chart = new FusionCharts("/fusionchartsTest/FusionCharts/RealTimeLine.swf?S=FUSIONCHARTS.COM", "ChartId", "550", "390", "0", "1" );
chart.setDataURL("/fusionchartsTest/RTLine.xml");
chart.render("chartdiv");

注意红色字体部分，只有当id名称为**Id时就不会报这个错了，具体原因不太清楚，官网是这么说的：