Adding numbers

[Sarah Reichelt]

Don't forget to allow backspace, delete and perhaps return. You might need
to use rawKeyDown instead and check the ASCII value of each key pressed.

Cheers,
Sarah

> 
> Sometimes (mostly) I find it best to prevent a non-number input
> rather than complain about it later. Put the following script into a
> field that you want the user to enter a number into:
> 
> on keyDown theKey
> if theKey is in "1234567890-." then pass keyDown
> end keyDown
> 
> -- 
> Michael J. Lew
> 
> Senior Lecturer
> Department of Pharmacology
> The University of Melbourne
> Parkville 3010
> Victoria
> Australia
> 
> Phone +613 8344 8304
> 
> **
> New email address: michaell at unimelb.edu.au
> **
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