if (document.images){
	b1b = new Image;
	b1b.src = "images/b1b.gif";
	b1a = new Image;
	b1a.src = "images/b1a.gif";
	b2b = new Image;
	b2b.src = "images/b2b.gif";
	b2a = new Image;
	b2a.src = "images/b2a.gif";
	b3b = new Image;
	b3b.src = "images/b3b.gif";
	b3a = new Image;
	b3a.src = "images/b3a.gif";
	b4b = new Image;
	b4b.src = "images/b4b.gif";
	b4a = new Image;
	b4a.src = "images/b4a.gif";
	b5b = new Image;
	b5b.src = "images/b5b.gif";
	b5a = new Image;
	b5a.src = "images/b5a.gif";
	b6b = new Image;
	b6b.src = "images/b6b.gif";
	b6a = new Image;
	b6a.src = "images/b6a.gif";
	b7b = new Image;
	b7b.src = "images/b7b.gif";
	b7a = new Image;
	b7a.src = "images/b7a.gif";
	b8b = new Image;
	b8b.src = "images/b8b.gif";
	b8a = new Image;
	b8a.src = "images/b8a.gif";
	b9b = new Image;
	b9b.src = "images/b9b.gif";
	b9a = new Image;
	b9a.src = "images/b9a.gif";
	b10b = new Image;
	b10b.src = "images/b10b.gif";
	b10a = new Image;
	b10a.src = "images/b10a.gif";
	}

function On(imgName) {
if (document.images) {
 imgFile = "images/" + imgName + "b.gif";
	document [imgName].src = imgFile;
 }
}

function Off(imgName) {
if (document.images) {
	imgFile = "images/" + imgName + "a.gif";
	document [imgName].src = imgFile;
	}
}