Form Field - Limit Character Input

[HHuggins@xxxxxxxxxxxx]

   Is there any way to set the maximum characters allowed for input on a
   notes field? I know in html I can use the following code to accomplish
   this on the web side: maxlength='# of characters"

   I think I can do it with an input validation, but I think that would still
   allow the user to input over the max limit and return an error only after
   the user leaves that field. I am hoping to set the input size that would
   be affect at the time of input.

   Thanks
   Herb