How can I display numerics only, with a comma, and no decimal spaces can be entered?

Hi all,

I'm currently using 2 types of script that essentially do the same thing perfectly, however, I want to also display the comma for large numbers:

Here's script 1:

if(!event.willCommit)

event.rc = /^\d*$/.test(event.change);

Here's script 2:

var reg = /^\d*$/;

event.rc = reg.test(event.value);

Does anyone know how I can add the comma to the scripts above or a new one do this?

Also note, I've already tried using the basic "number" in the format tab, but I do not want to display or allow the user to enter any decimals - so it has to be custom keystroke script I think.

The example above displays 8000 but I want it to display 8,000, I want the user to only be able to enter numerics and no other characters, or decimals (whole number only).

Any info would be appreciated
Thanks!

Alex