PS 1.7 how to dd javascript <script> to CMS pages

[web-design-milano]

I would like to add a short javascript code to a CMS Page. But when I save the page, I get kicked out of the page edit and an error message "The content field is invalid."

 

I have allow iframes ON, and HTML purifier OFF.

Is there any way to allow <script> in pages?

Thanks

[antoniopuglisidbcz10]

I've got more or less the same problem:

I've extended the TinyMCE Editor using the MyPresta tutorial but my JS Script keeps being wrapped in CDATA tags who I think are commenting out the JS Code.

 

Tried a lot of stuff and nothing worked.