This is how you get an instance of the editor when you are within the page that loads the editor:
FCKeditorAPI.GetInstance([instanceName]);
E.g.:
var editor = FCKeditorAPI.GetInstance('ctrArticle');
And this is how you get the editor instance when you are inside the editor instance:
var editor = FCK;
And lastly, this is how you get the name (DOM id) of the editor instance (get the instance using either of the methods above):
alert(editor.Name);
