function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

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

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		home_page_over = newImage("images/HomePageOver.gif");
		OverviewOver = newImage("images/OverviewOver.gif");
		CommitteeOrganisersOver = newImage("images/Committee&OrganisersOver.gif");
		ConferenceOver = newImage("images/ConferenceOver.gif");
		ExhibitionOver = newImage("images/ExhibitionOver.gif");
		SponsorshipOver = newImage("images/SponsorshipOver.gif");
		PressReleaseOver = newImage("images/PressReleaseOver.gif");
		FeedbackOver = newImage("images/FeedbackOver.gif");
		ContactUsOver = newImage("images/ContactUsOver.gif");
						
		preloadFlag = true;
	}
}