Can I put my own HTML code, JavaScript, or CSS styles on my site?

Yes.

 

You can click the Source button  on the editor toolbar to see the code view of the page or panel. Here, you can insert your own HTML code or JavaScript.  Click the source button again to return to the standard WYSIWYG view of your page.

 

This method can be used to input any of the advanced web programming features as long as they are strictly client-side operations since no access is given to server-side functions. This includes Spry and Ajax.