window.onload = rotate;

var thisAd = 0;

function rotate() {
	var adImages = new Array("http://www.siliconvalleypower.com/img/rap.jpg","http://www.siliconvalleypower.com/img/rap2.jpg","http://www.siliconvalleypower.com/img/rap3.jpg","http://www.siliconvalleypower.com/img/rap4.jpg","http://www.siliconvalleypower.com/img/rap5.jpg");

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

	setTimeout(rotate, 3 * 4000);
}