// JavaScript Document
openImgs = new Array("sp01.jpg","sp02.jpg","sp03.jpg","sp04.jpg","sp05.jpg","sp06.jpg","sp07.jpg","sp08.jpg","sp09.jpg",
	"sp10.jpg","sp11.jpg","sp12.jpg","sp13.jpg","sp14.jpg","sp15.jpg","sp16.jpg","sp17.jpg","sp18.jpg","sp19.jpg",
	"sp20.jpg","sp21.jpg","sp22.jpg","sp23.jpg");
numImgs = 23;

randomNum = Math.floor((Math.random() * numImgs));
document.getElementById('c1').setAttribute("background","http://www.daveconger.com/spXX/" + openImgs[randomNum]);