//Build the photo file array
NewImg = new Array ();
var numImages = 69;
for (i=0; i<numImages; i++)
{
 NewImg[i]="images/studentphotos/"+(i+1)+".JPG";
}

// Generate random number for random slides
var randomnumber=Math.floor(Math.random()*numImages);
var ImgNum = randomnumber;
var ImgLength = NewImg.length - 1;

//Time delay between Slides in milliseconds
var delay = 3000;

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);
   }
}
//  End