Brackets in variable name

I have to send information to an external vendor using their existing parameters. However, they have included brackets [] in some of their variable names. As you might expect AS3 can’t resolve the variable name. Does anyone know a way around this?

An example parameter: patron_info[first_name]

Used like:


r:URLRequest = new URLRequest
v:URLVariable = new URLVariable
v.patron_info[first_name] = txt_fname.text;
r.data = v;

I have asked them if they could change the parameter name, but my deadline is fast approaching.

Thanks

Marty