javascript being striped out - Help ?

when i paste something with javascript into the editor . it never gets saved....

in fact .. when i open the editor ...
i click the source button .
past my script as well as html ...
if i click the source button to go back to the wysiwyg
when i click the view source button the javascript is gone ...


i can do the same thing on the site demo and it does not strip the tags.


can someone help ...