js 驗證 －身份證等

js驗證身份證：

function isIdCard(idCard) {
    var num = idCard.toLowerCase().match(/\w/g);
    if (idCard.match(/^\d{17}[\dx]$/i)) {
      var sum = 0,
        times = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
      for (var i = 0; i < 17; i++) {
        sum += parseInt(num[i], 10) * times[i];
      }
      if ('10x98765432'.charAt(sum % 11) != num[17]) {
        return false;
      }
      return !!idCard.replace(/^\d{6}(\d{4})(\d{2})(\d{2}).+$/, '$1-$2-$3');
    }
    if (idCard.match(/^\d{15}$/)) {
      return !!idCard.replace(/^\d{6}(\d{2})(\d{2})(\d{2}).+$/, '19$1-$2-$3');
    }
    return false;
  }

檢查身份證是否小於 18歲：

 function checkAge(UUserCard) {
    var myDate = new Date();
    var month = myDate.getMonth() + 1;
    var day = myDate.getDate();
    var age = myDate.getFullYear() - UUserCard.substring(6, 10) - 1;
    if (
      UUserCard.substring(10, 12) < month ||
      (UUserCard.substring(10, 12) == month && UUserCard.substring(12, 14) <= day)
    ) {
      age++;
    }
    return age;
  }