var isNav = false;

if (navigator.appName.indexOf("Netscape") != -1) {
	isNav = true;
	navVer = navigator.appVersion;
}

function find_image(image_name, doc) {
	var img;
	var i;

	if (!doc) { doc = document; }

	if (isNav) {
		img = doc.images[image_name];
		for (i=0; !img && i < doc.layers.length; i++) {
			img = find_image(image_name, doc.layers[i].document);
		}
	} else {
		img = doc.all[image_name];
	}
	return img;
}

function swapImage() {
	var img;
	var num = 0;
	var args = swapImage.arguments;
	var i;

	document.original_images = new Array;
	
	for(i=0; i < args.length; i+=2) {
		img = find_image(args[i]);
		if (img) {
			document.original_images[num++] = img;
			img.orig_src = img.src;
			img.src=args[i+1];
		}
	}
} 

function swapImgRestore() {
	var img;
	var i;

	for(i=0; i < document.original_images.length; i++) {
		img = document.original_images[i];
		img.src = img.orig_src;
	}
}

function openwindow(url,w,h) {
	window.open(url,'','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width='+w+',height='+h+',left=20,top=20')
}