function reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) {
	if (isNetscape()&&isVer4()) {
    		document.pgW=innerWidth; 
		document.pgH=innerHeight; 
		onresize=reloadPage; 
	}
  } else if (innerWidth!=document.pgW || innerHeight!=document.pgH) location.reload();
}

function getObj(obj) {
	if (isNetscape()) return getObjNav4(obj);
	else return eval("document.all."+obj);
}

function getObjNav4(id, parent) {
	var parentObj = (parent)? parent : document;
	var layerObj;
	for (var i = 0; i < parentObj.layers.length && !layerObj; i++) {
		if (parentObj.layers[i].id == id) { layerObj = parentObj.layers[i]; break; }
		else layerObj = getObjNav4(id, parentObj.layers[i]);
	}
	return layerObj;
}

function getImage(id) {
	if (isNetscape() && isVer4()) {
		return getImageNav4(id);
	} else return eval("document.all."+id);
}

function getImageNav4(id, parent) {
	var parentObj = (parent)? parent : document;
	var imgObj = parentObj.images[id];
	if (!imgObj) {
		for (var i = 0; i < parentObj.layers.length && !imgObj; i++)
			imgObj = getImageNav4(id, parentObj.layers[i].document);
	}
	return imgObj;
}

function getBrowser()  // get the browser program name
{
  if (navigator.appName == null || navigator.appName == "")
    return "other";
  else if (navigator.appName == "Netscape")
    return "netscape";
  else if (navigator.appName == "Microsoft Internet Explorer")
    return "ie";
  else
    return "other";
}

function isNetscape()  // is browser Netscape?
{
  if (getBrowser() == "netscape")
    return true;
  else
    return false;
}

function isIE()  // is browser IE?
{
  if (getBrowser() == "ie")
    return true;
  else
    return false;
}

function getBrowserVer()  // get the browser version
{
  if (navigator.appVersion == null || navigator.appVersion == "")
    return "n/a";
  // fix for IE 5.x appVersion bug, which returns 4.x instead of 5.x
  if (isIE() && navigator.userAgent.indexOf("5.") != -1)
    { 
    var verNum = "";
    var str = navigator.userAgent;
    var pos = str.indexOf("IE ");  // real version num follows "IE "
    for (pos=pos+3; pos<str.length; pos++)  // build verNum string
      if (str.charAt(pos) == "." || 
         (str.charAt(pos) <= "9" && str.charAt(pos) >= "0"))
        verNum += str.charAt(pos);
      else
        break;
    return verNum;
    }
  var verArray = navigator.appVersion.split(" ");
  return verArray[0];
}

function isVer3()  // is browser version 3.x?
{
  if (getBrowserVer() >= 3.0 && getBrowserVer() < 4.0)
    return true;
  else
    return false;
}

function isVer4()  // is browser version 4.x?
{
  if (getBrowserVer() >= 4.0 && getBrowserVer() < 5.0)
    return true;
  else
    return false;
}

function isVer4up()  // is browser version 4.0+? (for DHTML coding)
{
  if (getBrowserVer() >= 4.0)
    return true;
  else
    return false;
}

function isVer5()  // is browser version 5.x?
{
  if (getBrowserVer() >= 5.0 && getBrowserVer() < 6.0)
    return true;
  else
    return false;
}

function getPlatform()  // get the browser platform (OS)
{
  if (navigator.platform == null || navigator.platform == "")
    return "other";
  else if (navigator.platform.indexOf("Mac") >= 0)
    return "mac";
  else if (navigator.platform.indexOf("Win") >= 0)
    return "win";
  else if (navigator.platform.indexOf("Unix") >= 0)
    return "unix";
  else
    return "other";
}

function isMac()  // is browser OS Mac?
{
  if (getPlatform() == "mac")
    return true;
  else
    return false;
}

function isWin()  // is browser OS Windows?
{
  if (getPlatform() == "win")
    return true;
  else
    return false;
}

function isUNIX()  // is browser OS UNIX?
{
  if (getPlatform() == "unix")
    return true;
  else
    return false;
}

function ifBVPjump(browser, version, platform, URL)
{
  // first make sure that version = user's browser version
  if (version.indexOf("x") != -1)  // version is in "#.x" format
    {
    if ((version.charAt(0) == "3") && (isVer3() == false))
      return;  // version's incorrect, return
    else if ((version.charAt(0) == "4") && (isVer4() == false))
      return;  // version's incorrect, return 
    else if ((version.charAt(0) == "5") && (isVer5() == false))
      return;  // version's incorrect, return 
    }
  else if (version.indexOf(".") != -1) // version is in #.#[#] format
    {
    if (version != getBrowserVer())
      return;  // version's incorrect, return to caller
    }
  // okay, version's correct, but what about browser/platform?
  if ( ((browser == getBrowser()) || (browser == "any"))
       && 
       ((platform == getPlatform()) || (platform == "any")) )
    top.document.location.href = URL;  // BVP all correct, jump!
  else
    return;  // B and/or P incorrect, return
}

function getLeft(obj) // get x offset for object
{
	if (isNetscape()) {
		return obj.pageX;
	} else {
		var le = obj.offsetLeft;
		while (obj.offsetParent) {
			obj = obj.offsetParent;
			le += obj.offsetLeft
		}
		return le;
	}
}

function getTop(obj) // get y offset for object
{
	if (isNetscape()) {
		return obj.pageY;
	} else {
		var to = obj.offsetTop;
		while (obj.offsetParent) {
			obj = obj.offsetParent;
			to += obj.offsetTop;
		}
		return to;
	}
}

function getRight(obj) // get right coordinate for object
{
	return getLeft(obj) + getWidth(obj);
}

function getBottom(obj) // get bottom coordinate for object
{
	return getTop(obj) + getHeight(obj);
}

function getHeight(obj) // get the objects height
{
	if (isNetscape()) return obj.clip.height;
	else return obj.offsetHeight;
}

function getWidth(obj) // get the objects width
{
	if (isNetscape()) return obj.clip.width;
	else return obj.offsetWidth;
}

function setLeft(obj, value) {
	if (isNetscape()) obj.pageX = value;
	else obj.style.pixelLeft = value;
}

function setTop(obj, value) {
	if (isNetscape()) obj.pageY = value;
	else obj.style.pixelTop = value;
}

function setWidth(obj, value) {
	if (isNetscape()) obj.clip.width = value;
	else obj.style.pixelWidth = value;
}

function setHeight(obj, value) {
	if (isNetscape()) obj.clip.height = value;
	else obj.style.pixelHeight = value;
}

function getEventX(evnt) {
	if (isNetscape()) return evnt.pageX;
	else return evnt.clientX;
}

function getEventY(evnt) {
	if (isNetscape()) return evnt.pageY;
	else return evnt.clientY;
}

function showObj(obj, show) // show or hide an object
{
	if (isNetscape()) {
		if (show) obj.visibility = "show";
		else obj.visibility = "hide";
	} else {
		if (show) obj.style.visibility = "visible";
		else obj.style.visibility = "hidden";
	}
}

function isObjInside(obj, insObj) // returns true if obj is inside insObj
{
	return (getTop(obj) >= getTop(insObj) && getBottom(obj) <= getBottom(insObj) && getLeft(obj) >= getLeft(insObj) && getRight(obj) <= getRight(insObj));			
}

function isInside(x, y, obj) // returns true if coord is inside insObj
{
	return (y >= getTop(obj) && y <= getBottom(obj) && x >= getLeft(obj) && x <= getRight(obj));			
}