// Figure out which browser is being used
var ie4 = false;
var ns4 = false;
var ns6 = false;
if (navigator.appVersion.charAt(0) == "4") 
	if (navigator.appName.indexOf("Explorer") >= 0)
		ie4 = true;
	else
		ns4 = true;
else if (navigator.appVersion.charAt(0) > "4")
	ns6 = true;

	
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;}
}}

//***************** DHTML Routines
// Constructor for cross-platform / cross-browser layer object
function Layer(layerName, outerLayer) {
	this.layer = "";
	this.html = "";
	this.xCoor=0;
	this.yCoor=0;
	this.children = new Array();

outerLayerName = new String(outerLayer);
if(outerLayerName == 'undefined')
{
	outerLayerName = '';
}

this.layer = findDOM('', layerName, 0);
	
	if (ie4 || ns6) {
		this.move = LayerMoveDOM;
		this.moveBy = LayerMoveByDOM;
		this.show = LayerShowDOM;
		this.hide = LayerHideDOM;
		this.resize = LayerResizeDOM;
		this.getHtml = LayerGetHtmlDOM;
		this.setHtml = LayerSetHtmlDOM;
		this.addChild = LayerAddChildDOM;
	} else {
		this.move = LayerMoveNS;
		this.moveBy = LayerMoveByNS;
		this.show = LayerShowNS;
		this.hide = LayerHideNS;
		this.resize = LayerResizeNS;
		this.getHtml = LayerGetHtmlNS;
		this.setHtml = LayerSetHtmlNS;
		this.addChild = LayerAddChildDOM;  // This will not work in netscape 4
	}
}

// Get the inner HTML (for netscape 4, will only work if setHtml was used first...)
function LayerGetHtmlDOM() {return this.layer.innerHTML;}
function LayerGetHtmlNS() {return this.html;}

// Replace the contents of the layer
function LayerSetHtmlDOM(data) {
	this.html=data;

	// save inner layers - fixes IE5 bug with child layers
	var innerDivs = new Array(this.children.length);		// Stick into a real array so reference is not lost
	
	for (var loop=0; loop < innerDivs.length; loop++) {
		innerDivs[loop]=this.children[loop].layer;
	}

	for (var loop=0; loop < innerDivs.length; loop++) {
		document.body.appendChild(innerDivs[loop]);
	}

	this.layer.innerHTML=data;

	// restore inner layers 
	for (var loop=0; loop < innerDivs.length; loop++) {
		this.layer.appendChild(innerDivs[loop]);
	}
}

function LayerSetHtmlNS(data) {
	this.layer.document.open();
	this.layer.document.write(data);
	this.layer.document.close();
	this.html=data;
}

// Move layer to new x/y coordinates
function LayerMoveDOM(xCoor, yCoor) {
	this.xCoor=xCoor;
	this.yCoor=yCoor;
	this.layer.style.left = this.xCoor;
	this.layer.style.top = this.yCoor;
}

function LayerMoveNS(xCoor, yCoor) {
	this.xCoor=xCoor;
	this.yCoor=yCoor;
	this.layer.left = this.xCoor;
	this.layer.top = this.yCoor;
}

// Move layer to new x/y coordinates
function LayerMoveByDOM(xCoor, yCoor) {
	this.xCoor += xCoor;
	this.yCoor += yCoor;
	this.move(this.xCoor,this.yCoor);
}

function LayerMoveByNS(xCoor, yCoor) {
	this.xCoor += xCoor;
	this.yCoor += yCoor;
	this.move(this.xCoor,this.yCoor);
}

// Resize layer
function LayerResizeDOM(x, y) {
	this.layer.style.height = y;
	this.layer.style.width = x;
}

function LayerResizeNS(x, y) {
	this.layer.height = y;
	this.layer.width = x;
}


// Show a DHTML layer
function LayerShowDOM(layerName) {
	this.layer.style.visibility = "visible";
	this.layer.style.display = "";
}

function LayerShowNS(layerName) {this.layer.visibility = "show";}

// Hide a DHTML layer
function LayerHideDOM(layerName) {
	this.layer.style.visibility = "hidden";
	this.layer.style.display = "none";
}

function LayerHideNS(layerName) {document.layers[layerName].visibility = "hide";}

// Add another layer as a child that appears within this one.  Requires a DOM-Capable browser (IE5+/NS6+)
function LayerAddChildDOM(childLayer) {
	this.children[this.children.length] = childLayer;
	this.layer.appendChild(childLayer.layer);
}