function preloadImages2() {
	if (document.images) {
		back = newImage("images/navbuttons/button1.gif");
		back_over = newImage("images/navbuttons/button1_over.gif");
		up = newImage("images/navbuttons/button2.gif");
		up_over = newImage("images/navbuttons/button2_over.gif");
		next = newImage("images/navbuttons/button3.gif");
		next_over = newImage("images/navbuttons/button3_over.gif");
		}
	}

function inbutton(buttonno) {
	if (document.images) {
		document.images["button"+buttonno].src="images/navbuttons/button" + buttonno + "_over.gif";
		}
	}


function outbutton(buttonno) {
	if (document.images) {
		document.images["button"+buttonno].src="images/navbuttons/button" + buttonno + ".gif";
		}
	}