var tinyMCEmode = true;
function toogleEditorMode(sEditorID) {
    try {
        if(tinyMCEmode) {
            tinyMCE.removeMCEControl(tinyMCE.getEditorId(sEditorID));
            tinyMCEmode = false;
        } else {
            tinyMCE.addMCEControl(document.getElementById('page_body'), sEditorID);
            tinyMCEmode = true;
        }
    } catch(e) {
        //error handling
    }
}