//http://www.w3schools.com/dom/dom_node.asp
function getElem(id) { return document.getElementById(id); }


var photos = new Array('r/g/photos/photo01.gif', 'r/g/photos/photo02.gif',
'r/g/photos/photo03.gif', 'r/g/photos/photo04.gif',
'r/g/photos/photo05.gif', 'r/g/photos/photo06.gif');

var currentPhoto = 0;

function changePhoto(){
	getElem('photoId').innerHTML = '<img src="'+photos[currentPhoto]+'?v1" />';
	
	currentPhoto++;
	
	if(currentPhoto == photos.length){
		currentPhoto = 0;
	}
	setTimeout('changePhoto()' ,6000);
}