Form Field Font Size Formula

[rhoneyfi]

Hello,
I am using Acrobat 5.0. I have created a pdf contract document that has form fields in it. Basically, a user goes online, fills out some fields and this info gets sent to the PDF doc when they click the submit button. It works great, except:
1) One of the form fields is for the user name. If they have a long name, it gets cut off on the PDF doc. For legal purposes, the length of the form field is limited. It is possible to have some kind of java code associated with the form field so that if the client name is greater than a certain number of characters, it makes the font size for the form field 8 points????
I know I can select the option of 'milti line' in the form field properties, but this will not work for me in my case.
Thanks

 

[okiiyama]

Not every character is the same width, but you could I guess
do something like this.

--I dont know where to put the code... But here is the code anyways

if(this.getField("WhateverName").value.length > SomeAmount) {
this.getField("WhateverName").textSize = 8;
}