window.onload =  choosePic;

var adImages = new Array("Showcase/img1.jpg","Showcase/img2.jpg","Showcase/img3.jpg","Showcase/img4.jpg",
"Showcase/img5.jpg","Showcase/img6.jpg","Showcase/img7.jpg","Showcase/img8.jpg","Showcase/img9.jpg",
"Showcase/img10.jpg","Showcase/img11.jpg","Showcase/img12.jpg","Showcase/img13.jpg","Showcase/img14.jpg",
"Showcase/img15.jpg","Showcase/img16.jpg","Showcase/img17.jpg","Showcase/img18.jpg","Showcase/img19.jpg",
"Showcase/img20.jpg");
var thisAd = 0;

function rotate() {
	thisAd++;
	if (thisAd == adImages.length) {
		thisAd = 0;
	}
	document.getElementById("adBanner").src = adImages[thisAd];

	setTimeout("rotate()", 6 * 1000);
}

function choosePic() {
	thisAd = Math.floor((Math.random() * adImages.length));
	document.getElementById("adBanner").src = adImages[thisAd];
	
	rotate();
}