if (document.images) {
	aboutOff = new Image(); aboutOff.src="/images/nav/about.gif";
	aboutOn = new Image(); aboutOn.src="/images/nav/aboutOn.gif";
	servicesOff = new Image(); servicesOff.src="/images/nav/services.gif";
	servicesOn = new Image(); servicesOn.src="/images/nav/servicesOn.gif";
	contactOff = new Image(); contactOff.src="/images/nav/contact.gif";
	contactOn = new Image(); contactOn.src="/images/nav/contactOn.gif";
}


function img_act(img) {
	if (document.images) {
	imgOn = eval(img + "On.src");
	document [img].src = imgOn;
	}
}

function img_inact(img) {
	if (document.images) {
	imgOff = eval(img + "Off.src");
	document [img].src = imgOff;
	}
}

var popupWindow = null;

function popup(url, features, width, height, x, y)
{
	if(popupWindow != null && !popupWindow.closed)
		popupWindow.close();
	
	popupWindow = window.open(url, "popupWindow", features+",width="+width+",height="+height+",screenX="+x+",screenY="+y+",left="+x+",top="+y);
	
	return popupWindow;
}