Validate numbers and some characters in a form field.

Dear all

I am creating a form and in it, there are fields for email and phone number.

I found http://forums.adobe.com/thread/857974

to be really useful in helping me validate my email field.

Then I tried to tweak that for the phone number field which I need to only allow the characters 1234567890+()

As you can see, its just numbers and +(). How to I restrict the field to only accept those characters?

I tried this but it failed:

// Custom Validate script for text field

(function () {

          var val = String(event.target.value);

          // Do nothing if the field is blank

          if (!val) return;

          // If the value is not a valid telephone number...

          if (!val.match(/\+?[0-9\(\)]*/)) {

                    // ...let the user know the value is not a valid telephone number...

                    app.alert("Please enter a telephone number, eg +012(3)123123123", 3);

                    // ...and set the focus back to this field

                    event.target.setFocus();

}

})();

But it does not work. Sigh.

I have 0 background in computer language (I'm a biologist, and this is a form for doctors to fill up patient data), and would appreciate some help in getting the phone field validation to work.

Thanks!