function changeSlide() {
    var pathArray = document["slide"].src.split(/\//);
    var nextSlide;
    currentSlide = pathArray[pathArray.length - 1];
    if (currentSlide === "slide01.jpg") nextSlide = "slide02.jpg";
    else if (currentSlide === "slide02.jpg") nextSlide = "slide03.jpg";
    else if (currentSlide === "slide03.jpg") nextSlide = "slide04.jpg";
    else if (currentSlide === "slide04.jpg") nextSlide = "slide05.jpg";
    else if (currentSlide === "slide05.jpg") nextSlide = "slide06.jpg";
    else if (currentSlide === "slide06.jpg") nextSlide = "slide07.jpg";
    else if (currentSlide === "slide07.jpg") nextSlide = "slide08.jpg";
    else if (currentSlide === "slide08.jpg") nextSlide = "slide09.jpg";
    else if (currentSlide === "slide09.jpg") nextSlide = "slide10.jpg";
    else if (currentSlide === "slide10.jpg") nextSlide = "slide11.jpg";
    else if (currentSlide === "slide11.jpg") nextSlide = "slide12.jpg";
    else if (currentSlide === "slide12.jpg") nextSlide = "slide13.jpg";
    else if (currentSlide === "slide13.jpg") nextSlide = "slide01.jpg";
    else nextSlide = "slide01.jpg";
    document["slide"].src = "images/slideshow/" + nextSlide;
    timerID = setTimeout('changeSlide()', 5000);
}