// len = No. Photos, str = image tag + location/size of photos

var len = 7;
var ran = Math.floor(Math.random() * len);
var str = '<img src="images/rotating_pics/pic'+ran+'.jpg" width="167" height="151" border="" alt="" title="" id="newPhotoSrc" />';
document.write(str);


function newPhoto() {
	var len = 7;
	var ran = Math.floor(Math.random() * len);
	document.getElementById("newPhotoSrc").src = "images/rotating_pics/pic"+ran+".jpg";
}

setInterval(newPhoto, 5000);