var isDHTML = 0;
var isLayers = 0;
var isAll = 0;
var isID = 0;

if (document.getElementById) {
	isID = 1; isDHTML = 1;
} else {
	if (document.all) {
		isAll = 1; isDHTML = 1;
	} else {
		browserVersion = parseInt(navigator.appVersion);
		if ((navigator.appName.indexOf('Netscape') != -1) && (browserVersion ==4)) {
			isLayers=1; isDHTML =1;
		}
	}
}
// change the style sheet to match the browser
var detect = navigator.userAgent.toLowerCase();
var isNavigator = checkIt('gecko'); //netscape and mozilla
var isIE = checkIt('msie'); // internet explorer
var isMac = checkIt('mac'); //apple macs
if (isNavigator) {
	findTag('link').href = "css/stylesheet_netscape.css";
}
if (isIE) {
	 findTag('link').href = "css/stylesheet_ie.css";
}
if (isMac) {
	 findTag('link').href = "css/stylesheet_mac.css";
}
function checkIt(string)
{
	return detect.indexOf(string) + 1;
}
function findTag(tagName) {
	if (isID) {
		return (document.getElementsByTagName(tagName)[0]);
	} else {
		if (isAll) {
			return (document.all.tags[tagName][0]); 
		} else {
			if (isLayers) {
				return (document.layers.tags[tagName][0]);
			}
		}
	}
}
function findDOM(objectID,withStyle) {
	if (withStyle == 1) {
		if (isID) {
			return (document.getElementById(objectID).style); 
		} else { 
			if (isAll) {
				return (document.all[objectID].style); 
			} else {
				if (isLayers) {
					return (document.layers[objectID]); 
				}
			}
		}
	} else {
		if (isID) { 
			return (document.getElementById(objectID));
		} else {
			if (isAll) { 
				return (document.all[objectID]); 
			} else {
				if (isLayers) {
					return (document.layers[objectID]);
				}
			}
		}
	}
}       
function navSelect(cell) {
	cell.className = "navSelect";
}
function navNormal(cell) {
	cell.className = "nav";
}
function navSelectChild(cell) {
	cell.className = "navSelectChild";
}
function navNormalChild(cell) {
	cell.className = "navChild";
}
function showChildren(objID){
	findDOM(objID, 1).display = "block";
}
function hideChildren(objID){
	findDOM(objID, 1).display = "none";
}
function gotoPage(location) {
	window.location = location;
}