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) {
		bell_over = newImage("graphics/b_bell_a.gif");
		jason_over = newImage("graphics/b_jason_a.gif");
		about_over = newImage("graphics/b_about_a.gif");
		sponsors_over = newImage("graphics/b_sponsors_a.gif");
		museuem_over = newImage("graphics/b_museum_a.gif");
		preloadFlag = true;
	}
}

window.onload = preloadImages;

function openWindow(theURL,winName,features)
	{
	window.open(theURL,winName,features);
	}

function closeWindow()
	{
	window.close();
	}