How do I set a form field to accept whole numbers only?

Question

I am using Acrobat X.
I have a number of fields in a form that are used in a variety of calculations. It is the nature of these fields that they need to contain whole numbers only, no decimals.
On the "Format" tab, I have set the field format to "Number" and the number of decimal places to "0"
On the "Validate" Tab I have set the "Field Value is in Range" "From 0", "To 999"
This is to ensure that the field can only contain a maximum of a three digit number.
But this still allows the user to enter decimal places. This messes up my calculations so I want to limit the user's input to whole numbers.
How do I do that?
Thanks!
Steve

Answer 1

I apologize for being dense but I really do not know how to apply your solution. Taking the path you suggested there is nothing under Tools>Document Processing relating to Java scripts.
I presume that I have to save this part somewhere in Acrobat:
// Document-level function
function triDigKS() {
　　　 // Get all that is currently in the field
　　　 var val = AFMergeChange(event);
　　　 // Reject entry if anythig but digits
　　　 event.rc = AFExactMatch(/\d{0,3}/, val);
And then use the call out:
// Custom Keystroke script
triDigKS();
Somewhere else but I don't know where thos two places are. Do I use the callout in the validation tab, or somewhere else?
Thanks
Steve