if(document.images) {
	navaboutOn = new Image();
	navaboutOn.src = "images/navabout2.gif";
	navaboutOff = new Image();
	navaboutOff.src = "images/navabout1.gif";
	navbooksOn = new Image();
	navbooksOn.src = "images/navbooks2.gif";
	navbooksOff = new Image();
	navbooksOff.src = "images/navbooks1.gif";
	navreviewsOn = new Image();
	navreviewsOn.src = "images/navreviews2.gif";
	navreviewsOff = new Image();
	navreviewsOff.src = "images/navreviews1.gif";
	navfriendsOn = new Image();
	navfriendsOn.src = "images/navfriends2.gif";
	navfriendsOff = new Image();
	navfriendsOff.src = "images/navfriends1.gif";
}
function activate(image_name) {
	if(document.images) {
		document[image_name].src = eval(image_name + "On.src");
		}
}
function deactivate(image_name) {
	if(document.images) {
		document[image_name].src = eval(image_name + "Off.src");
	}
}