if (document.images) {
logo1 = new Image ();
logo1.src = "block1.jpg";
logo2 = new Image ();
logo2.src = "block2.jpg";
logo3 = new Image ();
logo3.src = "block3.jpg";
logo4 = new Image ();
logo4.src = "block2.jpg";

logo1r = new Image ();
logo1r.src = "rotated.gif";
logo2r = new Image ();
logo2r.src = "rotated.gif";
logo3r = new Image ();
logo3r.src = "rotated.gif";
logo4r = new Image ();
logo4r.src = "rotated.gif";
}

function LOn (imgName) {
	if (document.images) {
		document [imgName].src = eval (imgName + "r.src");
		}
}
function LOff (imgName) {
	if (document.images) {
		document [imgName].src = "blank.gif";
		document [imgName].src = eval (imgName + ".src");
	}
}