Custom Number Format Default to Numeric Keyboard

Question

Hello,
I recently put together a timesheet form for our superintendents.  I have some fields to accept our company's 6-digit cost codes.  Initially, I used the general  Number format.  This worked well since, on the iPad, the numeric keyboard came up by default and only numbers were accepted.  However, there was no limit to the number and it always removed the leading "0", which was not acceptable.  Our cost codes are layed out as follows:
011010
082010
120010
It was important that we retain the leading "0".  Then, after some research I found a code (entered into to Custom format) on this forum allowing me to retain that zero:
event.rc = true;
if (event.value) {
     if (/^\d{6}$/.test(event.value)==false) {
          app.alert("Error! The entered value must be 6 digits.");
          event.rc = false;
This worked well... however, I am back to the numeric keyboard not being default and the field accepting letters as well as number. 
MY QUESTION:
How do I create a numeric only, exactly 6-digit field that will open the numeric keyboard on the iPad (like the number field does).  Is this possible?

Answer 1

Hello,
I recently put together a timesheet form for our superintendents.  I have some fields to accept our company's 6-digit cost codes.  Initially, I used the general  Number format.  This worked well since, on the iPad, the numeric keyboard came up by default and only numbers were accepted.  However, there was no limit to the number and it always removed the leading "0", which was not acceptable.  Our cost codes are layed out as follows:
011010
082010
120010
It was important that we retain the leading "0".  Then, after some research I found a code (entered into to Custom format) on this forum allowing me to retain that zero:
event.rc = true;
if (event.value) {
     if (/^\d{6}$/.test(event.value)==false) {
          app.alert("Error! The entered value must be 6 digits.");
          event.rc = false;
This worked well... however, I am back to the numeric keyboard not being default and the field accepting letters as well as number. 
MY QUESTION:
How do I create a numeric only, exactly 6-digit field that will open the numeric keyboard on the iPad (like the number field does).  Is this possible?