onBeforeTabClick

fires before a segment is clicked

boolean onBeforeTabClick(number|string id,Event ev);

id	number\|string	the id of the segment
ev	Event	the click event object

boolean

returns false, if the event handler returns false, returns true by default

segmented.attachEvent("onBeforeTabClick", function(id,ev){
    //code
});

Details

Unlike the onItemClick event this one watches clicks over separate segments and passes the ID of a clicked segment into its handler.

You can block clicking by returning false from the event handler.