js根据身份证计算年龄

/**根据身份证计算年龄
*@param UUserCard 身份证号码
*/

function IdCard(UUserCard) {
    //获取年龄
    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++;
    }
    
    $("#age").val(age);
}