JQuery :: Simple Dynamic Variable - Select Multiple Inputs

Basically, i have a CSS/jQuery keyboard from NETTUTS; however my problem is trying to select multiple inputs. Everything works as it should, however i want to select the input, store it in hidden field (which input is current), then when i start to type, it can enter the characters into that input field (that is selected). Currently, it just allows me to enter inputs into a single textarea. I want to onfocus, set as "Focusedfield", and when i type it goes into that field.

Here is my JS code to select/store the "focusedField". Triggered by onFocus. to make the textArea i select, be the one i type into.

Code:

Here is the jQuery

The issue is with this first $write variable. I cannot for the life of me, get it to detect the dynamic variable. When i hardcode the inputs name, it works, but when i try something dynamic - it doesn't. Line 2 of that function is where my issue is (i believe).

Code:

I've tried to replace

Code:

With

Code:

And

Code:

As well as plain old JS var "current_form".

I think its just 1 or 2 lines where this issue is.