Disabling tabs in the xml specification of a tabbar

Is there a way to disable specific tabs already during XML loading (by specificying a tab as disabled in XML)?

There is no predefined attribute for such task, but you can add new one if necessary, just locate in dhtmlxtabbar.js next line

if (atabs[j].getAttribute(“selected”)) selected=id;

and add after it

if (atabs[j].getAttribute(“disabled”)) that.disableTab(id);