window.onload = randomImg;

var img = new Array("images/snaps/top-run.jpg", "images/snaps/top-run2.jpg", "images/snaps/top-run3.jpg", "images/snaps/top-run4.jpg", "images/snaps/top-run5.jpg", "images/snaps/top-run6.jpg");
	
	
	
	function randomImg() {
		ranNum = Math.floor((Math.random() * img.length));
		document.getElementById("top-run").src = img[ranNum];
		 
		
	}