Can I insert Javascript or other code?
In short, no. The basis for this answer is the previously mentioned HTML statement. In most cases, an alternative solution to Javascript is available. See Scripts for more information and examples. File types including PHP, INC, HTM, HTML, DHTML, SHTML, PL and CGI may not be stored in the CMS file manager. Use of such files conflicts with the paradigm where Web developers maintain programming code to ensure security and uniformity in look and feel of pages. If you have need to use such files because a particular functionality is not already provided by CMS, it might not be the appropriate host location for your application.