Hello.
I am a total newbie and I've been trying to build a website for a friend as a favour.
I'm trying to insert some Javascript into the HTML source editor in the CMS but I click insert and nothing happens and the code seems to be stripped out.

I understand that tiny MCE might be stripping out the code? Any silverstripe experts out there know how I can just write and edit code like normal into the HTML editor? Some sort of setting I have to change or list of allowed elements to put into the config files or something.

I'm really at a loss here. Please help me.

I think you might be better of just placing the Javascript in the template file, or if you need to be able to add for each page via the CMS, add a normal textfield, instead of the HTMLEditorField.

See http://doc.silverstripe.org/framework/en/tutorials/2-extending-a-basic-site for info on how to add custom fields to the CMS.

Hope it helps :o)