// This code follows Chapter 11 of "DHTML and CSS for the World Wide Web"
// by Jason Cranford Teague.

// First, set up flags.
// We'll use these later to quickly check what sort of DOM we're using.
if (document.getElementById) {
	// uses W3C standard DOM
	var isDHTML = 1
	var isLayers = 0
	var isAll = 0
	var isId = 1
} else if (document.all) {
	// uses Microsoft DOM
	var isDHTML = 1
	var isLayers = 0
	var isAll = 1
	var isId = 0
} else if ((navigator.appName.indexOf('Netscape') != -1) 
	&& (parseInt(navigator.appVersion) == 4)){
	// uses Netscape 4 DOM
	var isDHTML = 1
	var isLayers = 1
	var isAll = 0
	var isId = 0
} else {
	// uses no DOM (or unknown)
	var isDHTML = 0
	var isLayers = 0
	var isAll = 0
	var isId = 0
}

function findObject(objectId) {
	// returns a copy of the object
	if (isId) {
		return (document.getElementById(objectId))
	} else if (isAll) {
		return (document.all[objectId])
	} else if (isLayers) {
		return (document.layers[objectId])
	} else {
		return (NULL)
	}
}

function findObjectStyle(objectId) {
	// returns a copy of the object's style
	if (isId) {
		return (document.getElementById(objectId).style)
	} else if (isAll) {
		return (document.all[objectId].style)
	} else if (isLayers) {
		return (document.layers[objectId])
	} else {
		return (NULL)
	}
}