var timeDelay = 5; // change delay time in seconds
var Pix = new Array
("shared/images/cycle1.png"
, "shared/images/cycle2.png"
, "shared/images/cycle3.png"
, "shared/images/cycle4.png"
, "shared/images/cycle5.png"
, "shared/images/cycle6.png"
, "shared/images/cycle7.png"
, "shared/images/cycle8.png"
);
var howMany = Pix.length;
timeDelay *= 1000;
var PicCurrentNum = 0;
var PicCurrent = new Image();
PicCurrent.src = Pix[PicCurrentNum];

function startPix() {
    setInterval("slideshow()", timeDelay);
}

function slideshow() {
    PicCurrentNum++;
    if (PicCurrentNum == howMany) {
        PicCurrentNum = 0;
    }
    PicCurrent.src = Pix[PicCurrentNum];
    document["imgCycle"].src = PicCurrent.src;
}