solr/server/solr-webapp/webapp/js/lib/jquery.jstree.js
function () { 
        var f = $.jstree._focused();
        if(f && f !== this) {
          f.get_container().removeClass("jstree-focused"); 
        }
        if(f !== this) {
          this.get_container().addClass("jstree-focused"); 
          focused_instance = this.get_index(); 
        }
        this.__callback();
      }
function () { 
        var f = $.jstree._focused();
        if(f && f !== this) {
          f.get_container().removeClass("jstree-focused"); 
        }
        if(f !== this) {
          this.get_container().addClass("jstree-focused"); 
          focused_instance = this.get_index(); 
        }
        this.__callback();
      }
deal with focus