var ns = (document.layers) ? 1:0
var ie = (document.all && !document.getElementById) ? 1:0
var ie5 = (document.getElementById && !window.innerHeight) ? 1:0
var ns6 = (window.innerHeight && !document.layers) ? 1:0
var op = (ns6 && !document.getElementsByTagNameNS) ? 1:0

var mac = (navigator.platform.indexOf('Mac') > -1) ? 1:0
var ispc = (!mac) ? 1:0

// Resolves a NS4 bug that causes dynamic content to disappear at onResize
if (document.layers) {
	origWidth = innerWidth;
	origHeight = innerHeight;
}
function reDo() {
if (innerWidth != origWidth || innerHeight != origHeight) 
	location.reload();
}

if (ns) onresize = reDo;


//  B E G I N   L A Y E R    M A N I P U L A T I O N   S C R I P T S

// Returns a browser-specific layer object
function getObject(obj,nestDiv) { 
if (ns) {
	if (nestDiv) nest=nestDiv+".document.";	
	else nest="";
	var theObj = eval("document." + nest + obj);
}
else if (ie) {	
	var theObj = eval("document.all." + obj + ".style");
}
else {
	var theObj = document.getElementById(obj)
}
return theObj;
} 


// Returns the current x,y coordinate of a layer
function getPosition(obj,edge,nestDiv) {
if (ns6) {
	pos=parseInt(getObject(obj).style[edge]);
}
else if (ie5) {
	pos=parseInt(document.all[obj].currentStyle[edge]);
}
else {
	if (ie && edge=="left") edge="pixelLeft";
	if (ie && edge=="top") edge="pixelTop";
	pos=getObject(obj,nestDiv)[edge];
}
return pos
}

function getHeight(obj) {
	if (ns) hgt = getObject(obj).document.height;
	else if (ie || ie5) hgt = parseInt(getObject(obj).scrollHeight);
	else hgt = parseInt(getObject(obj).offsetHeight);
	return hgt;
}

function getWidth(obj) {
	if (ns) wth=getObject(obj).document.width;
	else if (ie || ie5) wth=parseInt(getObject(obj).scrollWidth);
	else wth=parseInt(getObject(obj).offsetWidth);
	return wth;
}


// Opera doesn't understand the "px" for a Y value
var px=(op) ? "":"px";

// Moves layer to new x,y coordinate
function moveLayer(obj,x,y,nestDiv) {
if (ns) {
	getObject(obj,nestDiv).moveTo(x,y);
} 
else if (ie) {		
	getObject(obj).pixelLeft = x;
	getObject(obj).pixelTop = y;
}
else {
	getObject(obj).style.left = x + px;
	getObject(obj).style.top = y + px;	
}
}

// Resizes layer to a new width and height
function resizeLayer(obj,w,h,nestDiv) {
if (ns || ie) {
	getObject(obj,nestDiv).height=h;
	getObject(obj,nestDiv).width=w;

} 
else {
	getObject(obj).style.width = w + px;
	getObject(obj).style.height = h + px;	
}
}



// Functions to manipulate image states
function getImage(img,nestDiv) {
if (ns && nestDiv) nest=nestDiv+".document.";
else nest="";
var theObj = eval ("document." + nest + img );
return theObj
}

function imgOn(imgName,nestDiv) {
if (document.images){
	getImage(imgName,nestDiv).src = eval(imgName + "on.src");
}
}

function imgOff(imgName,nestDiv) {
if (document.images){
	getImage(imgName,nestDiv).src = eval(imgName + "off.src");
}
}


// Functions to hide and show layer
if (ns) {
	var hide="hide";
	var show="show";
}
else {
	var hide="hidden";
	var show="visible";
}

function hideLayer(obj,nestDiv) {
if (ns || ie) {
	getObject(obj,nestDiv).visibility = hide;
} 
else {
	getObject(obj).style.visibility = hide;
}	
}

function showLayer(obj,nestDiv) {
if (ns || ie) {
	getObject(obj,nestDiv).visibility = show;
}
else {
	getObject(obj).style.visibility = show
}		
}


// Write new content to the layer
function writeLayer(obj,content){
if (ns) {
	document[obj].document.open();
	document[obj].document.write(content);
	document[obj].document.close();
}	
else if (ie) {
	document.all[obj].innerHTML=content
}
else {
	getObject(obj).innerHTML=content
}
}

// Change the z-index of a layer
function stackLayer(obj,z,nestDiv) {
if (ns || ie) {
	getObject(obj,nestDiv).zIndex=z
}
else getObject(obj).style.zIndex=z
}

// Change clipping parameters for a layer
function clipLayer(obj,t,r,b,l,nestDiv) {
obj=getObject(obj,nestDiv)
if (ns) {
	obj.clip.top=t
	obj.clip.right=r
	obj.clip.bottom=b
	obj.clip.left=l			
}
else if (ie) 
	obj.clip="rect("+t+"px "+r+"px "+b+"px "+l+"px)";
else 
	obj.style.clip="rect("+t+"px "+r+"px "+b+"px "+l+"px)";
}


//  E N D   L A Y E R   M A N I P U L A T I O N   S C R I P T S