NewImg = new Array (
"art/1987.jpg",
"art/1988.jpg",
"art/1989.jpg",
"art/1990.jpg",
"art/1991.jpg",
"art/1992.jpg",
"art/1993.jpg",
"art/1994.jpg",
"art/1995.jpg",
"art/1996.jpg",
"art/1997.jpg",
"art/1998.jpg",
"art/1999.jpg",
"art/2000.jpg",
"art/2001.jpg",
"art/2002.jpg",
"art/2003.jpg",
"art/2004.jpg",
"art/2005.jpg"
);
var ImgNum = 0;
var ImgLength = NewImg.length - 1;
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);
   }
}