docs: function spinner(){
      
      var opts = {
        lines: 13, 
        length: 8, 
        width: 2, 
        radius: 10, 
        corners: 1, 
        rotate: 0, 
        color: '#000', 
        speed: 2, 
        trail: 60, 
        shadow: true, 
        hwaccel: true, 
        className: 'spinner', 
        zIndex: 2e9, 
        top: 'auto', 
        left: 'auto' 
      }
      
      var spinner = new Spinner(opts).spin()
      
      $spin
        .append(spinner.el)
        .hide()
      
    }