Jstree callback method when loading and loading completed -sunziren

　1, sometimes when using jstree we want to execute a method after it loaded at once, so we can use the following jstree own callback:　

      .on ( 'ready.jstree', function (Event, obj) { 
          fun1 (); 
      });
   2 , if you want to execute a method in the loading process , so we can use the following jstree own callback:

      .on('loaded.jstree', function(event, obj) {
          fun2();
      });