function(){
var points = this.points; //表示同一个分类的不同系列点
var a =this.category;
var b;
for(var i = 0, len = points.length; i < len; i++) {
if(points[i].series.visible){
if(this.points[i].seriesName=="出厂水游离氯")
b = FR.contentFormat(this.points[i].value, '#0.0mg/L');
else if(this.points[i].seriesName=="出厂总氯")
b = FR.contentFormat(this.points[i].value, '#0mg/L');
else
b = FR.contentFormat(this.points[i].value, '#0.0');
a += ''+"<font color='"+points[i].color+"'>●</font>"+points[i].seriesName+':'+b;
}
}
return a;
}