if(document.images) {

	var navHomeOff = new Image();
	navHomeOff.src = "/images/nav/btn_home_0.gif";
	var navHomeOn = new Image();
	navHomeOn.src = "/images/nav/btn_home_1.gif";
	
	var navAboutOff = new Image();
	navAboutOff.src = "/images/nav/btn_about_0.gif";
	var navAboutOn = new Image();
	navAboutOn.src = "/images/nav/btn_about_1.gif";
	
	var navHowOff = new Image();
	navHowOff.src = "/images/nav/btn_how_0.gif";
	var navHowOn = new Image();
	navHowOn.src = "/images/nav/btn_how_1.gif";
	
	var navContactOff = new Image();
	navContactOff.src = "/images/nav/btn_contact_0.gif";
	var navContactOn = new Image();
	navContactOn.src = "/images/nav/btn_contact_1.gif";
	
}