code: function getProvinceRandomIp(provinceName){
  	var ipAddress=null;
  	if(chineseIps.hasOwnProperty(provinceName)){
  		provinceIps=chineseIps[provinceName];
  	    var item=getRandomItem(provinceIps);
  		ipAddress=getRandomIp(item.min,item.max);
  	} 
  	return ipAddress;
  }
docs: 随机产生指定省的随机ip