var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		homeOn = new Image();   homeOn.src = "img/nav/home_hvr.jpg";
		homeOff = new Image();   homeOff.src = "img/nav/home.jpg";
		
		aboutOn = new Image();   aboutOn.src = "img/nav/about_hvr.jpg";
		aboutOff = new Image();   aboutOff.src = "img/nav/about.jpg";
		
		jobsOn = new Image();   jobsOn.src = "img/nav/jobs_hvr.jpg";
		jobsOff = new Image();   jobsOff.src = "img/nav/jobs.jpg";
		
		case_studiesOn = new Image();   case_studiesOn.src = "img/nav/case_studies_hvr.jpg";
		case_studiesOff = new Image();   case_studiesOff.src = "img/nav/case_studies.jpg";

		teamOn = new Image();   teamOn.src = "img/nav/team_hvr.jpg";
		teamOff = new Image();   teamOff.src = "img/nav/team.jpg";
		
		contactOn = new Image();   contactOn.src = "img/nav/contact_hvr.jpg";
		contactOff = new Image();   contactOff.src = "img/nav/contact.jpg";

		getcreativeOn = new Image();   getcreativeOn.src = "img/nav/getcreative_ro.gif";
		getcreativeOff = new Image();   getcreativeOff.src = "img/nav/getcreative.gif";
		
		gridOn = new Image();   gridOn.src = "img/nav/view_grid_ro.gif";
		gridOff = new Image();   gridOff.src = "img/nav/view_grid.gif";

		newsletterOn = new Image();   newsletterOn.src = "img/nav/newsletter_ro.gif";
		newsletterOff = new Image();   newsletterOff.src = "img/nav/newsletter.gif";
		
		craftyOn = new Image();   craftyOn.src = "img/nav/crafty_ro.gif";
		craftyOff = new Image();   craftyOff.src = "img/nav/crafty.gif";
		
		prevOn = new Image();   prevOn.src = "img/nav/prev_ro.gif";
		prevOff = new Image();   prevOff.src = "img/nav/prev.gif";
		
		nextOn = new Image();   nextOn.src = "img/nav/next_ro.gif";
		nextOff = new Image();   nextOff.src = "img/nav/next.gif";
		
		buy_btnOn = new Image();   buy_btnOn.src = "img/nav/buy_btn_ro.gif";
		buy_btnOff = new Image();   buy_btnOff.src = "img/nav/buy_btn.gif";
		
		readerOn = new Image();   readerOn.src = "img/nav/reader_icon_ro.jpg";
		readerOff = new Image();   readerOff.src = "img/nav/reader_icon.jpg";
		
		preloadFlag = true;
	}
}

function imgOn(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "On.src");
	}
}

function imgOff(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "Off.src");
	}
}