js 正则验证多个ip地址并用逗号分隔

//检测多个ip地址用逗号分隔
   function checkIpv6(ip) {
            var reg = /^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$/

            var valdata = ip.split(',');

            for(i=0;i<valdata.length;i++){

                if(reg.test(valdata[i])== false){
                    layer.alert("Ip格式不正确");
                    return false;
                }
            }

        };