I am trying to validate and format North American phone numbers  They should always be ten digits in the format (xxx) xxx-xxxx.

 

Here is my code:

 

// get input without special characters
rawno = input.Cell_Number.getAlphaNumeric();
// remove letters
rawno = rawno.removeAllAlpha();
// get number of digits
noln = rawno.length();
if (noln  !=  10)
{
    alert("Number must be ten digits.\nYou entered " + noln + " digits.\nPlease re-enter number.");
}
else
{
    areacode = rawno.subString(0,2);
etc.

 

But the substring only returns the first two digits, not the first three.

 

Similarly...

      exchange = rawno.subString(3,5);

... only returns two digits.

 

Is there a bug in the substring function?  If yes, is there a workaround?

 

------------------------------------------------------

 

Later....

 

I found a workaround: just make the ending index number 1 higher than it actually is.  Thus...

 

      areacode = rawno.subString(0,3);

 

... returns the first three digits, and ...

 

      exchange = rawno.subString(3,6);

 

... returns the next three.  And so on.

 

Any plans to fix this?