function menuOn(target) {
	var targetOn = "images/" + target + "on.gif";
	document.all[target].background = targetOn;
}
function menuOff(target) {
	var targetOff = "images/" + target + "off.gif";
	document.all[target].background = targetOff;
}
function preloadMenu() {
	image1 = new Image();
	image1.src = "images/speedshopon.gif";
	image2 = new Image();
	image2.src = "images/machineshopon.gif";
	image3 = new Image();
	image3.src = "images/enginedynoon.gif";
	image4 = new Image();
	image4.src = "images/contactuson.gif";
	image5 = new Image();
	image5.src = "images/newson.gif";
	image6 = new Image();
	image6.src = "images/linkson.gif";
	image7 = new Image();
	image7.src = "images/ubbon.gif";
}