Mobile Scheduler popup

How can I access the confirm/no buttons events, to add extra events?

when I want to delete an event to be more precise

It is not possible to redefine delete button logic. But you can set onBeforeDelete or onAfterDelete event handlers for Scheduler data:

$$("scheduler").data.attachEvent("onAfterDelete",function(id){
    /*your code here*/
    return true;
});

This events will be called before/after an event is deleted

that will do the trick, thanks!