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) {
		nAboutover = newImage("images/nAboutover.gif");
		nVisionover = newImage("images/nVisionover.gif");
		nProductsover = newImage("images/nProductsover.gif");
		nServicesover = newImage("images/nServicesover.gif");
		nGNUover = newImage("images/nGNUover.gif");
		nLinksover = newImage("images/nLinksover.gif");
		nContactover = newImage("images/nContactover.gif");
		nHomeover = newImage("images/nHomeover.gif");
		preloadFlag = true;
	}
}
var newWin;
function openPopup(urlStr){
	newWin = window.open(urlStr,"newWin","width=840,height=640,toolbar=0,resizable=0,scrollbars=1,menubar=0");
newWin.focus();

}