function changeTestimonial() { 
  document.getElementById('testimonials').innerHTML = "<p>hello len received the pt-17 and it is awesome i want to thank you and your staff for all of your help you are very professional thanks again</p><p>L.B.</p>"; 
  var script = document.createElement("script");
  script.setAttribute("type", "text/javascript");
  script.setAttribute("src", "javascript/testimonials.js.php?delay=true&rand="+new Date());
  var head = document.getElementsByTagName('head')[0];
  if (x = document.getElementById("testimonialsScript")) {
   // remove old script
    head.removeChild(x);
  }
  // add script
  script.id="testimonialsScript";
  head.appendChild(script);
}