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];
document.getElementById('slideshow').src = "crystals/"+ NewImg[ImgNum];
document.getElementById('theCount').innerHTML = (ImgNum+1)+ " of "+CmDs;
   }
}
function auto() {
if (lock == true) {

lock = false;
window.clearInterval(run);
document.getElementById('btn_play').src = "slideshow/play.gif";
}
else if (lock == false) {
lock = true;
run = setInterval("chgImg(1)", delay);
document.getElementById('btn_play').src = "slideshow/pause.gif";
   }
}

function loadImg(id){
	document.getElementById('slideshow').src = "crystals/"+ NewImg[id];
}