"Type" issue?

[John Ridge]

While playing around with numToChar and so on, I put the following silly
script into a card. It is intended to substitute random characters for the
one the user types into a text field on the card.

function randomInRange lowerLimit,upperLimit
 return random(upperLimit - lowerLimit + 1) + lowerLimit - 1
end randomInRange

on keyDown whichKey
  put randomInRange (120, 150)into fakeKey
  put numtoChar (fakeKey)into whichKey
  put whichKey
 pass keyDown
end keyDown

Really silly, of course. As it stands, it simply displays the random
character in the message box. But if I change "put whichKey" to "type
whichKey", I get an error message - there is a problem with the function
handler. I'm puzzled - there wasn't a problem with the function handler a
moment ago. Why does the change from "put" to "type" generate one? Duh...
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