NewImg = new Array (
"ambassadors1.jpg",
"ambassadors2.jpg",
"ambassadors3.jpg",
"ambassadors4.jpg",
"ambassadors5.jpg",
"ambassadors6.jpg",
"ambassadors7.jpg",
"ambassadors8.jpg"
);
var ImgNum = 0;
var ImgLength = NewImg.length - 1;

//Time delay between Slides in milliseconds
var delay = 4000;

var lock = false;
var run;
function chgImg(direction) {
if (document.images) {
ImgNum = ImgNum + direction;
if (ImgNum > ImgLength) {
ImgNum = 0;
}
if (ImgNum < 0) {
ImgNum = ImgLength;
}
document.slideshow.src = 'images/slideshow/' + NewImg[ImgNum];
   }
}
function auto() {
if (lock == true) {
lock = false;
window.clearInterval(run);
}
else if (lock == false) {
lock = true;
run = setInterval("chgImg(1)", delay);
   }
}

<!-- Original:  Mike Canonigo (mike@canonigo.com) -->
<!-- Web Site:  http://www.munkeehead.com -->

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->