获取生日、性别、年龄和身份证算法

//根据身份证取 省份,生日，性别
function getInfo() {
    //获取输入身份证号码
    var ic = $("#txtCardID").val();
    ic = checkId(ic);
    if (isNaN(ic)) return;
    var ic = String(ic);
    //获取出生日期
    var birth = ic.substring(6, 10) + "-" + ic.substring(10, 12) + "-" + ic.substring(12, 14);
    //获取性别
    var gender = ic.slice(14, 17) % 2 ? "1" : "2"; // 1代表男性，2代表女性
    var sexOption = document.getElementsByName("rabSex");
    for (var i = 0; i < sexOption.length; i++) {
        if (sexOption[i].value == gender) {
            sexOption[i].checked = true;
            break;
        }
    }
    //获取年龄
    var myDate = new Date();
    var month = myDate.getMonth() + 1;
    var day = myDate.getDate();
    var age = myDate.getFullYear() - ic.substring(6, 10) - 1;
    if (ic.substring(10, 12) < month || ic.substring(10, 12) == month && ic.substring(12, 14) <= day) {
        age++;
    }
    $("#txtAge").val(age);
}