Hi , please try this, maybe it help you. Don't change it. Just copy & paste.
[select* menu-dob-month "1" "2" "3" "4" "5" "6" "7" "8" "9" "10" "11" "12"] /
[select* menu-dob-day "1" "2" "3" "4" "5" "6" "7" "8" "9" "10" "11" "12" "13" "14" "15" "16" "17" "18" "19" "20" "21" "22" "23" "24" "25" "26" "27" "28" "29" "30" "31"] / [select* menu-dob-year "2000" "1999" "1998" "1997" "1996" "1995" "1994" "1993" "1992" "1991" "1990" "1989" "1988" "1987" "1986" "1985" "1984" "1983" "1982" "1981" "1980" "1979" "1978" "1977" "1976" "1975" "1974" "1973" "1972" "1971" "1970" "1969" "1968" "1967" "1966" "1965" "1964" "1963" "1962" "1961" "1960" "1959" "1958" "1957" "1956" "1955" "1954" "1953" "1952" "1951" "1950" "1949" "1948" "1947" "1946" "1945" "1944" "1943" "1942" "1941" "1940" "1939" "1938" "1937" "1936" "1935" "1934" "1933" "1932" "1931" "1930" "1929" "1928" "1927" "1926" "1925" "1924" "1923" "1922" "1921" "1920" "1919" "1918" "1917" "1916" "1915" "1914" "1913" "1912" "1911" "1910" "1909" "1908" "1907" "1906" "1905" "1904" "1903" "1902" "1901"]