if (document.images) {
	selectedWorksOn = new Image();
	selectedWorksOn.src = "/images/nav/selectedWorksOn.gif";
	selectedWorksOff = new Image();
	selectedWorksOff.src = "/images/nav/selectedWorksOff.gif";
	biographyOn = new Image();
	biographyOn.src = "/images/nav/biographyOn.gif";
	biographyOff = new Image();
	biographyOff.src = "/images/nav/biographyOff.gif";
}