var ie = (document.all) ? true:false;
var ns = (document.layers) ? true:false;
var ns6 = ((navigator.appName == "Netscape") && (navigator.userAgent.indexOf("6.") >= 0)) ? true:false;

var visible = 'visible';
var hidden = 'hidden';
var layerRef = '';
var styleRef = '';

if (ns) {
visible = 'show';
hidden = 'hide';
layerRef = '.layers';
styleRef = '';
}
else if (ns6) {
document.getElementById('services').style.visibility = "hidden";
document.getElementById('aboutus').style.visibility = "hidden";
document.getElementById('comingsoon').style.visibility = "hidden";
document.getElementById('contactus').style.visibility = "hidden";
}
else if (ie){
visible = 'visible';
hidden = 'hidden';
layerRef = '.all';
styleRef = '.style';
}

function showLayer(layerName) {
	if (ns6) {
		eval("document.getElementById(layerName).style.visibility = 'visible'")
	}
	else {
		eval("document"+layerRef+"[layerName]"+styleRef+".visibility = 'visible'")
		if ((navigator.userAgent.indexOf('Mac') >= 1) && (navigator.appName == "Microsoft Internet Explorer")) {
			eval("document"+layerRef+"[layerName]"+styleRef+".top = '73px'")
		}
		else if ((navigator.userAgent.indexOf('Mac') >= 1) && (navigator.appName == "Netscape")) {
			eval("document"+layerRef+"[layerName]"+styleRef+".top = '77'")
		}
	}
}
function hideLayer(layerName) {
	if (ns6) {
		eval("document.getElementById(layerName).style.visibility = 'hidden'")
	}
	else {
		eval("document"+layerRef+"[layerName]"+styleRef+".visibility = 'hidden'")
	}
}