Try changing your js variable to
js = ('js/tiny_mce/tiny_mce.js','js/tiny_mce/textareas.js'),For some reason on my installation, the /media/ is automagically added.
Try changing your js variable to
js = ('js/tiny_mce/tiny_mce.js','js/tiny_mce/textareas.js'),For some reason on my installation, the /media/ is automagically added.