function SetContentCustomisability (customisable) {
    var visible = {
        'ContentCustomisePrompt_NoJS':       false,
        'ContentCustomisePrompt_JS_CurrNo':  !customisable,
        'ContentCustomisePrompt_JS_CurrYes': customisable,
        'CustomisableSections':              customisable
    };

    for (var id in visible) {
        document.getElementById(id).style.display
            = visible[id] ? 'block' : 'none';
    }
}