calling one method from another under same js object
<p>I wrote some js:</p>

<pre><code>var folersTreeMgr = {

    sendDeleteFolderRequestAndUpdateFoldersTree: function () {
       ...

        } else {
            createAjaxRequest("Manager/DeleteLocation", {
                'locationId': folder_minimal_descriptor.locationId
            }).done(function (isSucceeded) {

                if (isSucceeded) {

                    folersTreeMgr.deleteFolderInFoldersTree(); // works
                    this.deleteFolderInFoldersTree(); // doesn't work
                    deleteFolderInFoldersTree(); // doesn't work
                }

                //TODO: else: error
            });
        }
    },


    deleteFolderInFoldersTree: function () {
        $("#jstree").jstree("remove", null);
    }
};
</code></pre>

<p>why do I get "missing function" error</p>
