var ImgNum = 0;
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];
		document.getElementById('sl_label_top').innerHTML = LabelsTop[ImgNum];
		document.getElementById('sl_label_btm').innerHTML = LabelsBtm[ImgNum];
		document.getElementById('sl_url').href = URLs[ImgNum];
		document.slideshow.alt = AltTitle[ImgNum];
		document.slideshow.title = AltTitle[ImgNum];
	}
}
function auto() {
	if (lock == true) {
		lock = false;
		window.clearInterval(run);
	}
	else if (lock == false) {
		lock = true;
		run = setInterval("chgImg(1)", delay);
	 }
}

auto();