判断吗是否手机号码

function isMobileNumber(e) {
  var i =
      "134,135,136,137,138,139,150,151,152,157,158,159,187,188,147,182,183,184,178",
    n = "130,131,132,155,156,185,186,145,176",
    a = "133,153,180,181,189,177,173,170",
    o = e || "",
    r = o.substring(0, 3),
    d = o.substring(0, 4),
    s =
      !!/^1\d{10}$/.test(o) &&
      (n.indexOf(r) >= 0
        ? "联通"
        : a.indexOf(r) >= 0
        ? "电信"
        : "1349" == d
        ? "电信"
        : i.indexOf(r) >= 0
        ? "移动"
        : "未知");
  return s;
}