if (document.images) {
	productsoff = new Image (0,0);
	careersoff = new Image (0,0);
	joinoff = new Image (0,0);
	aboutoff = new Image (0,0);
	contactoff = new Image (0,0);
	jobsoff = new Image (0,0);
	buyoff = new Image (0,0);
	customersoff = new Image (0,0);
	
	productson = new Image (0,0);
	careerson = new Image (0,0);
	joinon = new Image (0,0);
	abouton = new Image (0,0);
	contacton = new Image (0,0);
	jobson = new Image (0,0);
	buyon = new Image (0,0);
	customerson = new Image (0,0);

	productsoff.src = "images/products_off.gif";
	careersoff.src = "images/careers_off.gif";
	joinoff.src = "images/join_off.gif";
	aboutoff.src = "images/about_off.gif";
	contactoff.src = "images/contact_off.gif";
	jobsoff.src = "images/jobs_off.gif";
	buyoff.src = "images/buy_off.gif";
	customersoff.src = "images/customers_off.gif";

	productson.src = "images/products_on.gif";
	careerson.src = "images/careers_on.gif";
	joinon.src = "images/join_on.gif";
	abouton.src = "images/about_on.gif";
	contacton.src = "images/contact_on.gif";
	jobson.src = "images/jobs_on.gif";
	buyon.src = "images/buy_on.gif";
	customerson.src = "images/customers_on.gif";
	
}

function act(imgName) {

	if (document.images) {
		document[imgName].src = eval(imgName + 'on.src');
	}
   
}

function inact(imgName) {

	if (document.images) {
		document[imgName].src = eval(imgName + 'off.src');
	}
   
}