Take two digits, intercept the number, ask for age, remove the space before and after

 //  Take two-digit   function   Todou (n) { if  (N < 10< Span style= "color: #000000") { return  ' 0 ' + n}  else   { return  ' + n}}  //  intercept number  function   GETN (s) { if   (s) { return  s.replace (/[^0-9\.)    /ig, "); }} 
  

Remove space before and after
String.prototype.trim = function () {
Return This.replace (/(^\s*) | ( \s*$)/g, ");
}

//seeking AgefunctionGetage (strbirthday) {varReturnage; varStrbirthdayarr = Strbirthday.split ("-"); varBirthyear = strbirthdayarr[0]; varBirthmonth = strbirthdayarr[1]; varBirthDay = strbirthdayarr[2]; D=NewDate (); varNowyear =d.getfullyear (); varNowmonth = D.getmonth () + 1; varNowday =d.getdate (); if(Nowyear = =birthyear) {Returnage= 0;//the same year is 0 years old}Else {        varAgediff = Nowyear-birthyear;//Years of Difference        if(Agediff > 0) {            if(Nowmonth = =birthmonth) {                varDaydiff = Nowday-birthday;//the difference between days                if(Daydiff < 0) {Returnage= AgeDiff-1; } Else{returnage=Agediff; }            } Else {                varMonthdiff = Nowmonth-birthmonth;//the difference of the month                if(Monthdiff < 0) {Returnage= AgeDiff-1; } Else{returnage=Agediff; }            }        } Else{returnage=-1;//Return-1 indicates birth date input error later than today        }    }    returnReturnage;//age of Return years}

The old driver ...

Take two digits, intercept the number, ask for age, remove the space before and after