NewImg = new Array (
"photos/Main/Main_01.JPG",
"photos/Main/Main_02.JPG",
"photos/Main/Main_03.JPG",
"photos/Main/Main_04.JPG",
"photos/Main/Main_05.JPG",
"photos/Main/Main_06.JPG",
"photos/Main/Main_01.JPG",
"photos/Main/Main_01.JPG"
);
var ImgNum = 0;
var ImgLength = NewImg.length - 1;

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

var lock = false;
var run = 4;
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 stop_delay() {
timedelay = 60000;
run = timedelay
show_param = show_delay = timedelay;
document.getElementById("show").src = show1.src;
}

function change_delay() {
show_param = 4;
timedelay = prompt('delay - in seconds', (show_param < 0)? 4 : show_param);
timedelay = run * 1000;
run = timedelay;
auto(run);
}

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