text: from bokeh.io import vform, output_file, show
  from bokeh.models import CustomJS, Slider, Div
  
  # NOTE: the JS functions to forvide the format code for strings is found the answer
  # from the user fearphage at http://stackoverflow.com/questions/610406/javascript-equivalent-to-printf-string-format
  callback = CustomJS(code="""
      var s1 = slider1.get('value')
      var s2 = slider2.get('value')
      var s3 = slider3.get('value')
  
      if (!String.prototype.format) {
        String.prototype.format = function() {
          var args = arguments;
          return this.replace(/{(\d+)}/g, function(match, number) {
            return typeof args[number] != 'undefined'
              ? args[number]
              : match
            ;
          });
        };
      }
  
      para.set('text', "<h1>Slider Values</h1><p>Slider 1: {0}<p>Slider 2: {1}<p>Slider 3: {2}".format(s1, s2, s3))
  """)
  
  para = Div(text="<h1>Slider Values:</h1><p>Slider 1: 0<p>Slider 2: 0<p>Slider 3: 0", width=200, height=150, render_as_text=False)
  
  s1 = Slider(title="Slider 1 (Continuous)", start=0, end=1000, value=0, step=1, callback=callback, callback_policy="continuous")
  s2 = Slider(title="Slider 2 (Throttle)", start=0, end=1000, value=0, step=1, callback=callback, callback_policy="throttle", callback_throttle=2000)
  s3 = Slider(title="Slider 3 (Mouse Up)", start=0, end=1000, value=0, step=1, callback=callback, callback_policy="mouseup")
  
  callback.args['para'] = para
  callback.args['slider1'] = s1
  callback.args['slider2'] = s2
  callback.args['slider3'] = s3
  
  output_file('slider_callback_policy.html')
  
  show(vform(s1, s2, s3, para))
  