function findBrowser() {
	var browser; 
	if (navigator.appName == 'Netscape' && document.layers != null) {
		browser = "ns";
	} else if (document.all != null) {
		browser = "ie"
	} else if (navigator.appName == 'Netscape' && document.layers == null && navigator.appVersion.substring(0,1) > 4) {
		browser = "ns6";
	} 
	return browser;
}

function getRef(id) {
	if (findBrowser() == "ns") {
		return document.layers[id];
	} else if (findBrowser() == "ie") {
		return document.all[id];
	} else if (findBrowser() == "ns6") {
		return document.getElementById(id);
	}
}

function changeColor(id,color) {
	if (findBrowser() == "ns") {
		getRef(id).bgcolor = color;
	}
	else if (findBrowser() == "ie" || findBrowser() == "ns6") {
		getRef(id).style.backgroundColor = color;
	}	
}

function changeClass(id,newClass) {
	getRef(id).className = newClass;
}

function changeImage(id,imageUrl) {
	document.getElementById(id).src = imageUrl;
}

function changeURL(URL) {
	document.location.href = URL;
}

function openWindow(URL) {
	window.open(URL);
}

function showLayer(id) {
	document.getElementById(id).style.display = "block";	
}

function hideLayer(id) {
	document.getElementById(id).style.display = "none";	
}

function showhide(layer_ref) { 
	var state = "";
	
	if (document.all) { //IS IE 4 or 5 (or 6 beta) 
		state = getRef(layer_ref).style.display;
	} 
	
	if (document.layers) { //IS NETSCAPE 4 or below 
		state = document.layers[layer_ref].display; 
	} 
	
	if (document.getElementById &&!document.all) { 
		hza = document.getElementById(layer_ref); 
		state = hza.style.display; 
	}
	
	if (state == 'block') { 
		state = 'none'; 
	} else { 
		state = 'block'; 
	} 
	
	if (document.all) { //IS IE 4 or 5 (or 6 beta) 
		eval( "document.all." + layer_ref + ".style.display = state");
	} 
	
	if (document.layers) { //IS NETSCAPE 4 or below 
		document.layers[layer_ref].display = state; 
	} 
	
	if (document.getElementById &&!document.all) { 
		hza = document.getElementById(layer_ref); 
		hza.style.display = state; 
	} 
}