I have a JQuery UI accordion that contains different parts of the user workflow. I would like to disable accordion "tabs" that the user hasn't reached yet. (So if the user hasn't signed in yet, he can't yet publish content, etc.) Then, as the user completes the necessary steps, more tabs will become enabled.

Is there a way to do this? This doesn't work, even as a way to prevent any tabs from changing:

$("#accordion").accordion({
    changestart: function(event, ui) {
        return false;
    }
});