browser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion)>= 3 )) || ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 )))

var folder = "/images/";

if (browser) {
	normal = new MakeArray(55)
	roll = new MakeArray(55)

	normal[1].src = folder + "topnav/home.gif"
	normal[2].src = folder + "topnav/search.gif"

	roll[1].src = folder + "topnav/home_over.gif"
	roll[2].src = folder + "topnav/search_over.gif"
}

function MakeArray(n) {
	this.length = n;
	for (var i = 1; i<=n; i++) 
		this[i] = new Image()
	return this;
}

function msover(num) {
	if ( browser) { 
		loadImage = "Image" + num;
		document.images[loadImage].src = roll[num].src;
	}
}

function msout(num) {
	if ( browser) {
		loadImage = "Image" + num;
		document.images[loadImage].src = normal[num].src;
	}
}