var imgSrc="/images/";

if ( document.images ) {
	image01on = new Image();
	image01on.src = imgSrc + "nav/home_on.gif";
	image02on = new Image();
	image02on.src = imgSrc + "nav/services_on.gif";
	image03on = new Image();
	image03on.src = imgSrc + "nav/clients_on.gif";
	image04on = new Image();
	image04on.src = imgSrc + "nav/contact_on.gif";
	
	image01off = new Image();
	image01off.src = imgSrc + "nav/home_off.gif";
	image02off = new Image();
	image02off.src = imgSrc + "nav/services_off.gif";
	image03off = new Image();
	image03off.src = imgSrc + "nav/clients_off.gif";
	image04off = new Image();
	image04off.src = imgSrc + "nav/contact_off.gif";
	
	image01roll = new Image();
	image01roll.src = imgSrc + "nav/home_roll.gif";
	image02roll = new Image();
	image02roll.src = imgSrc + "nav/services_roll.gif";
	image03roll = new Image();
	image03roll.src = imgSrc + "nav/clients_roll.gif";
	image04roll = new Image();
	image04roll.src = imgSrc + "nav/contact_roll.gif";
}

function changeImages() {
	if ( document.images ) {
		for ( var i = 0; i < changeImages.arguments.length; i += 2 ) {
			document[changeImages.arguments[i]].src = eval ( changeImages.arguments[i+1] + ".src" );
		}
	}
}