editor problem for category with javascript

hi
i've a problem with javascritp
I've to include a javascritp on the category description but when i save the category all the script was removed.
i use TinyMCE editor and is set for don't remove script from article infact on the article i can put the script correctly.
For solve the problem i've to disable the system-flexicontent plugin save the category and than reactive the fc plugin

any solution?
any suggestion for other editor?

multiple solution :
-disable editor for category description for testing
-try with JCE
-insert your javascript in field or in template

Hello

normally it will be removed only due to Joomla TEXT filters, or due to editor configuration

(super-admin group, usually has no filtering by Joomla default settings)

the fact that behavior changes when FC system plugin is on, show that this is related

- you are editing category via FLEXIcontent category edit form, right?