

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){
a += ''+"<font color='"+points[i].color+"'>●</font>"+points[i].seriesName+':'+points[i].value+' 占比:'+(points[i].percentage*100).toFixed(2)+'%';
}
}
return a;
}