window.addEvent('domready', function() {
var opt = {
    slides: 'img_slide',
    duration: 1000,
    delay: 5000, 
    auto:true,
    direction: 'h',
    transition:Fx.Transitions.Circ.easeOut,
	//Quart/Quad/Cubic/Linear/Quint/Pow/Expo/Circ/Cine/Back/Bounce/Elastic
    buttons: {next:'go-next2',prev:'go-prev2',play:'play',stop:'stop'}
}
  var scroller = new QScroller('botonera',opt);
  scroller.load();
});