#5 User typing ) causes error

[Anonymous]

First of all, great bit of code - just what I am looking for
for a mini-project I am working on....

However, when the user is prefilling the text field and
uses the close bracket ) symbol, an error is generated -
I'm not sure what to add to a regexp or a .replace to fix
this.

Help would be appreciated

Mark Mark dot Edwards at SofTools dot net