NewImg = new Array (
"media/images/slideshow/1.jpg",
"media/images/slideshow/2.jpg",
"media/images/slideshow/3.jpg",
"media/images/slideshow/4.jpg",
"media/images/slideshow/5.jpg",
"media/images/slideshow/6.jpg",
"media/images/slideshow/7.jpg",
"media/images/slideshow/8.jpg",
"media/images/slideshow/9.jpg",
"media/images/slideshow/10.jpg",
"media/images/slideshow/11.jpg",
"media/images/slideshow/12.jpg",
"media/images/slideshow/13.jpg",
"media/images/slideshow/14.jpg",
"media/images/slideshow/15.jpg",
"media/images/slideshow/16.jpg",
"media/images/slideshow/17.jpg",
"media/images/slideshow/18.jpg"
);
var ImgNum = 0;
var ImgLength = NewImg.length - 1;

//Time delay between Slides in milliseconds
var delay = 2000;

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 = NewImg[ImgNum];
   }
}
function auto() {
if (lock == true) {
lock = false;
window.clearInterval(run);
}
else if (lock == false) {
lock = true;
run = setInterval("chgImg(1)", delay);
   }
}