Enable/Disable FCKEditor at server-side

Hi,

    How exactly to enable / disable a FCKEditor at server-side in a web page w/
master pages? I tried using code below to test if it is working...

var oEditor =
FCKeditorAPI.GetInstance('ctl00_phContent_FeatureContent');<<--- ok here
tested using alert(oEditor) result to displaying [object] 

oEditor.EditorDocument.body.disabled = true;<<-- Error

  Another thing how do you execute a javascript method when page loads (to
disable fckeditor)??

  I search here and found no related/working answer...

  Hope to hear some info soon...

  Thanks in advanced.

Add a runat="server" and an ID to the editor in the aspx and then do
FCKEditorID.Visible = false;