public/javascripts/yui/treeview/treeview.js
function() {
        var s = this.el.style;
        s.display = "none";
        s.opacity = 1;
        s.filter = "alpha(opacity=100)";
        this.callback();
    }
function() {
        var s = this.el.style;
        s.display = "none";
        s.opacity = 1;
        s.filter = "alpha(opacity=100)";
        this.callback();
    }
function ( ) { var s = this . el . style ; s . display = "none" ; s . opacity = 1 ; s . filter = "alpha(opacity=100)" ; this . callback ( ) ; }
Clean up and invoke callback
@method onComplete
Clean up and invoke callback