var preloadFlag = true;
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];
		}
	}
}
function preloadImages() {
	if (document.images) {
		img_homeb = newImage("images/nav/homeblue.gif");
		img_aboutusb = newImage("images/nav/aboutusblue.gif");
		img_getnewsb = newImage("images/nav/getnewsblue.gif");
		img_ourexpertsb = newImage("images/nav/ourexpertsblue.gif");
		img_workshopsb = newImage("images/nav/workshopsblue.gif");
		img_publicationsb = newImage("images/nav/publicationsblue.gif");
		img_agencyb = newImage("images/nav/agencyblue.gif");
		img_contactb = newImage("images/nav/contactblue.gif");
		img_termsb = newImage("images/nav/termsblue.gif");
		preloadFlag = true;
	}
	else  {
		preloadFlag = false;
		}
}