SP2: FCK Flash upload: javascript issues with IE6

I have some javascript issues when trying to upload a flash file through the FCK editor (I successfully uploaded some flash files through webdav and I now want to map them in a big text - Corpv2 - double page - main_content)

1st Error within FCK while trying to display the thumbnails of the Flash
2nd JS error on the double page, once the flash was uploaded

I put my flash file in attachment.