function switchImage(imgName, imgSrc, imgCaption) 
{
  if (document.images)
  {
    if (imgSrc != "none")
    {
      document.getElementById('picCaption').innerHTML = imgCaption;
	  document.getElementById('slideImage').src = imgSrc;
    }
  }
}
var mySlideList1 = ['/images/frontPageSlides/1.jpg', '/images/frontPageSlides/4.jpg', '/images/frontPageSlides/5.jpg', '/images/frontPageSlides/8.jpg'];
var mySlideCaption1 = ['', '', '', ''];
var mySlideShow1 = new SlideShow(mySlideList1, mySlideCaption1, 'slideImage', 5000, "mySlideShow1");

function SlideShow(slideList, captionList, image, speed, name)          
{
  this.slideList = slideList;
  this.captionList = captionList;
  this.image = image;
  this.speed = speed;
  this.name = name;
  this.current = 0;
  this.timer = 0;
}

SlideShow.prototype.play = SlideShow_play;  

function SlideShow_play()       
{
  with(this)
  {
    if(current++ == slideList.length-1) current = 0;
    switchImage(image, slideList[current], captionList[current]);
    clearTimeout(timer);
    timer = setTimeout(name+'.play()', speed);
  }
}