Insert own Pictures

Hello together,

i have the problem, that there are no alias in the FCK-filemanager. If a user creates a new topic in my CMS, there will be also created a new folder in /fckdata. The name is the ID (e.G. 1342).

If the users want to add a picture, they have to know also the ID of the folder. To complicated for my user, they want the name.... The solutions are aliases.

So i programmed a solution yo can see in my screenshot

1. If a user edits a topic, he get all pictures of this topic (pictures in the folder with the same ID like the topic).
2. He clicks on the filename CIMG2872.JPG and with the Code document.getElementById("body").value=XXXX he should add something in the iframe.

But that doesn't happen

Do you know, how i could realize something like that?

Best regards
Sascha