pw=new Array();
pw[1]=new pollution('北京','Ⅲ１','可吸入颗粒物');
pw[2]=new pollution('天津','Ⅲ１','可吸入颗粒物');
pw[3]=new pollution('石家庄','Ⅲ２','可吸入颗粒物');
pw[4]=new pollution('太原','Ⅲ１','可吸入颗粒物');
pw[5]=new pollution('呼和浩特','Ⅲ１','二氧化氮');
pw[6]=new pollution('沈阳','Ⅲ２','可吸入颗粒物');
pw[7]=new pollution('大连','Ⅱ','可吸入颗粒物');
pw[8]=new pollution('长春','Ⅱ','可吸入颗粒物');
pw[9]=new pollution('哈尔滨','Ⅱ','可吸入颗粒物');
pw[10]=new pollution('上海','Ⅱ','可吸入颗粒物');
pw[11]=new pollution('南京','Ⅲ１','可吸入颗粒物');
pw[12]=new pollution('杭州','Ⅱ','可吸入颗粒物');
pw[13]=new pollution('合肥','Ⅲ１','可吸入颗粒物');
pw[14]=new pollution('福州','Ⅱ','可吸入颗粒物');
pw[15]=new pollution('厦门','Ⅰ','————');
pw[16]=new pollution('南昌','Ⅲ１','可吸入颗粒物');
pw[17]=new pollution('济南','Ⅲ１','可吸入颗粒物');
pw[18]=new pollution('青岛','Ⅱ','可吸入颗粒物');
pw[19]=new pollution('郑州','Ⅲ２','可吸入颗粒物');
pw[20]=new pollution('武汉','Ⅳ１','可吸入颗粒物');
pw[21]=new pollution('长沙','Ⅲ１','可吸入颗粒物');
pw[22]=new pollution('广州','Ⅰ','————');
pw[23]=new pollution('深圳','Ⅰ','————');
pw[24]=new pollution('汕头','Ⅱ','可吸入颗粒物');
pw[25]=new pollution('南宁','Ⅱ','可吸入颗粒物');
pw[26]=new pollution('海口','Ⅰ','————');
pw[27]=new pollution('重庆','Ⅲ１','二氧化硫');
pw[28]=new pollution('成都','Ⅲ１','可吸入颗粒物');
pw[29]=new pollution('贵阳','Ⅱ','可吸入颗粒物');
pw[30]=new pollution('昆明','Ⅰ','————');
pw[31]=new pollution('拉萨','Ⅱ','可吸入颗粒物');
pw[32]=new pollution('西安','Ⅲ１','可吸入颗粒物');
pw[33]=new pollution('兰州','Ⅴ','可吸入颗粒物');
pw[34]=new pollution('西宁','Ⅴ','可吸入颗粒物');
pw[35]=new pollution('银川','Ⅲ１','二氧化硫');
pw[36]=new pollution('乌鲁木齐','Ⅴ','可吸入颗粒物');