disable focus fields

I did not want, that the focus will set automatically on the first input field, if I open a create or edit windows. I tried it with the following code, but this did not work:

$( '#eventtable' ).on( 'click', 'tbody tr', function() {
        editor.create( this, {
            focus: null
        } );
        editor.edit( this, {
            focus: null
        } );
    } );

Has anyone some ideas what is wrong with my code?

Andreas