Is it possible to create a new wiki page in wiki document library via Javascript Client Object Model?

Question

I can find example using managed code, but I can get it translated to javascript code that I can use.
For example, this in managed code:
using
(SPSite
site = new
SPSite("http://sharepoint"))
  SPWeb
rootWeb = site.RootWeb;
  SPList
wiki = rootWeb.Lists["MyWiki"];
  SPFolder
rootFolder = wiki.RootFolder;
  SPFile
wikiPage = rootFolder.Files.Add(String.Format("{0}/{1}",
rootFolder, "My
Wiki Page.aspx"),
SPTemplateFileType.WikiPage);
When
I try to change that to javascript, I get a 'cannot find rootfolder'....
This
is what I have so far:
var pageName = "/digitalmerch/PageNotes/" + $('input[title="Page Name"]').val() + ".aspx";
//Get the current client context - creating the batch
context = SP.ClientContext.get_current(); 
site = context.get_web(); 
wiki = site.get_lists('PageNotes');
rootFolder = wiki.get_rootFolder();
wikiPage = rootFolder.get_files().AddTemplateFile(pageName), TemplateFileType.WikiPage);
context.load(wikiPage);
  context.executeQueryAsync(CreatePage2Succeeded, CreatePage2Failed);
But I obviously haven't translated this into javascript correctly -  the .get_rootFolder is undefined, and so the rootFolder.get_files().... is wrong as well.
Any hints?
Robin

Answer 1

Not specifically, this is on a standard list NewForm.aspx page - it should already be there. The code is in the PreSaveAction function, so by that time sp.js should be fully loaded on the page - I don't wait for it or use a ExecuteOrDelayUntilScriptLoaded(xxxx,"sp.js");
I know this is a syntax error somewhere. Also, all my objects are declared as global, so it shouldn't be anything like that..
And I see a typo above that I've fixed:
wikiPage = rootFolder.get_files().AddTemplateFile(pageName), TemplateFileType.WikiPage);
is actually
wikiPage = rootFolder.get_files().AddTemplateFile(pageName, TemplateFileType.WikiPage);
but that didn't help. I still get:
Object does not support get_rootFolder.
I've also tried splitting that part into the execution functions, making sure I load 'RootFolder' into the context, but that doesn't work either.
Robin