if (document.images) {  // If the image object exists
	// Preload images
	off = new Array(6)
	on = new Array(6)

	on[1] = new Image(98,25);
	on[1].src = "images/welcome_on.gif";
	on[2] = new Image(98,25);
	on[2].src = "images/services_on.gif";
	on[3] = new Image(98,25);
	on[3].src = "images/products_on.gif";
	on[4] = new Image(98,25);
	on[4].src = "images/support_on.gif";
	on[5] = new Image(98,25);
	on[5].src = "images/contacts_on.gif";
	on[6] = new Image(98,25);
	on[6].src = "images/form_on.gif";
	
	

	off[1] = new Image(98,25);
	off[1].src = "images/welcome.gif";
	off[2] = new Image(98,25);
	off[2].src = "images/services.gif";
	off[3] = new Image(98,25);
	off[3].src = "images/products.gif";
	off[4] = new Image(98,25);
	off[4].src = "images/support.gif";
	off[5] = new Image(98,25);
	off[5].src = "images/contacts.gif";
	off[6] = new Image(98,25);
	off[6].src = "images/forma.gif";
	}
	function buttonOn(buttonName,num) {
	if (document.images) { // If the image object exists
	// Change images on the page
	document[buttonName].src = on[num].src;
	}
	}
	function buttonOff(buttonName,num) {
	if (document.images) { // If the image object exists
	// Change images on the page
	document[buttonName].src = off[num].src;
	}
	}