var IE4 = (document.all); 
var NS4 = (document.layers);

function showLayer(layer){
	if (IE4) {
		objNav = document.all[layer];
		if (objNav) {
			objNav.style.visibility = 'visible';
		}
	}
	else if (NS4){
		objNav = document.layers[layer];
		if (objNav) {
			objNav.visibility = 'visible';
		}
	}
}
	
function hideLayer(layer){
	if (IE4){
		objNav = eval('document.all[layer]');
		if (objNav) {
			objNav.style.visibility = 'hidden';
		}
	}
	else if (NS4){
		if (objNav) {
			objNav.visibility = 'hidden';
		}
	}
}

function getMovie() {
	if (navigator.appName.indexOf ("Microsoft") !=-1) {
		//IE
		return window.movie;
	}
	else {
		//Netscape
		return document.movie;
	}
}

function LoadLayer(movie) {
		getMovie().LoadMovie (1, "flash/" + movie)
}