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() {

//alert('here');
	if (document.images) {
		navHomer = newImage("/images/navHomer.gif");
		navAboutr = newImage("/images/navAboutr.gif");
		navContactr = newImage("/images/navContactr.gif");
		navLoginr = newImage("/images/navLoginr.gif");
		navLogoutr = newImage("/images/navLogoutr.gif");
		preloadFlag = true;
	}
//alert('here too');
}