function getObj(obj){
	if (document.getElementByID){
		return document.getElementByID(obj);
	} else if (document.all){
		return document.all[obj];
	} else if (document[obj]){
		return document[obj];
	} else {
		return false;
	}
}
function nextSlide(){
	if (whichImage==3){
		whichImage = 1;
	} else {
		whichImage++;
	}
	thePhoto = getObj('photobar');
	thePhoto.src = imageObj[whichImage].src;
}
function slideshow(){
	imageObj = new Array();
	for (i=1; i<=3; i++){
		imageObj[i] = new Image();
		imageObj[i].src = 'images/photobar0'+i+'.jpg';
	}
	whichImage = 1;
	timerID = setInterval("nextSlide();",2000);
}