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) {
		bt_home_over = newImage("images/bt_home-over.jpg");
		bt_aboutus_over = newImage("images/bt_aboutus-over.jpg");
		bt_services_over = newImage("images/bt_services-over.jpg");
		bt_clients_over = newImage("images/bt_clients-over.jpg");
		bt_webfacts_over = newImage("images/bt_webfacts-over.jpg");
		bt_contactus_over = newImage("images/bt_contactus-over.jpg");
		preloadFlag = true;
	}
}

function createWindow(url,name,features) {
var xWin = window.open(url,name,features)
}