function runSlideShow(){
   document.images["SlideShow"].src = preLoad[image].src;
   image ++;
   if (image > (p-1)) {
	   image=0;
   }  
   time = setTimeout('runSlideShow()', speed);
}

var speed = 5000;

var Pic = new Array(4);

Pic[0] = 'images/slideshow1.jpg';
Pic[1] = 'images/slideshow2.jpg';
Pic[2] = 'images/slideshow3.jpg';
Pic[3] = 'images/slideshow4.jpg';


var time;
var image = 0;
var p = Pic.length;

var preLoad = new Array()
for (i = 0; i < p; i++){
   preLoad[i] = new Image()
   preLoad[i].src = Pic[i]
}