function FrameSetNav (sBodyFrame)
{
	window.GetNavURI = FrameSetNav_GetNavURI;
	window.GoToNavURI = FrameSetNav_GoToNavURI;
	window.FromNavURI = FrameSetNav_FromNavURI;
	
	window._sBodyFrame = sBodyFrame.toLowerCase();
	window.onload = FrameSetNav_FrameSetPageLoader;
	window._sLoadedWindow = null;
}

function FrameSetNav_FrameSetPageLoader()
{
	var sNamedArgs = window.location.search.substr(1);
	if (sNamedArgs.length != null && sNamedArgs.length > 0)
		{
		var sNewLocation = "";
		var asNamedArgsNoBodyArg = new Array();
		var asNamedArgs = sNamedArgs.split(/&/);
		for (var nNamedArg = 0; nNamedArg < asNamedArgs.length; nNamedArg++)
			{
			var sNamedArg = asNamedArgs[nNamedArg];
			var asParamAndArg = sNamedArg.split(/=/);
			if (asParamAndArg[0].toLowerCase() == window._sBodyFrame)
				sNewLocation = asParamAndArg[1];
			else
				asNamedArgsNoBodyArg.push(sNamedArg)
			}
		if (sNewLocation.length > 0)
			{
			var sNamedArgsNoBodyArg = asNamedArgsNoBodyArg.join("&");
			var sPath = window.location.pathname;
			var sNewPath = sPath.substr(0, sPath.lastIndexOf("/") + 1);
			var sNewURI = sNewPath + sNewLocation;
			if (sNamedArgsNoBodyArg.length > 0)
				sNewURI += "?" + sNamedArgsNoBodyArg;
			var winBody = window.frames(window._sBodyFrame);
			winBody.location = sNewURI;
			window._sLoadedWindow = FrameSetNav_CanonicalizeURI(sNewLocation);
			if (sNamedArgsNoBodyArg.length > 0)
				window._sLoadedWindow += "?" + sNamedArgsNoBodyArg;
			}
		}
}

function FrameSetNav_CanonicalizeURI(sURI)
{
	var sFramePath = window.location.pathname.substr(0, window.location.pathname.lastIndexOf("/"));
	var sURIPath = sURI;
	while (sURIPath.substr(0, 3) == "../")
		{
		sURIPath = sURIPath.substr(3);
		sFramePath = sFramePath.substr(0, sFramePath.lastIndexOf("/"));
		}
	return sFramePath + "/" + sURIPath;
}

function FrameSetNav_GetNavURI(framedWindow)
{
	// returns a path to the resource in the main window, relative to the frameset page
	var sFrameSetPath = window.top.location.pathname;
	var sFramedPath = framedWindow.location.pathname;
	var asFrameSetPathParts = sFrameSetPath.split(/\//);
	asFrameSetPathParts.pop();
	var asFramedPathParts = sFramedPath.split(/\//);
	var sResourceName = asFramedPathParts.pop();
	var cDepth = Math.max(asFrameSetPathParts.length, asFramedPathParts.length);
	var sNewPath = "";
	var bDifferentPaths = false;
	for (nDepth = 0; nDepth < cDepth; nDepth++)
		{
		if (nDepth < asFrameSetPathParts.length)
			{
			if (nDepth < asFramedPathParts.length)
				bDifferentPaths = bDifferentPaths || (asFrameSetPathParts[nDepth] != asFramedPathParts[nDepth]);
			else
				bDifferentPaths = true;
			if (bDifferentPaths)
				sNewPath = "../" + sNewPath;
			}
		else
			bDifferentPaths = true;
		if (nDepth < asFramedPathParts.length)
			if (bDifferentPaths)
				sNewPath = sNewPath + asFramedPathParts[nDepth] + "/";
		}
	var sNewFrameSetPath = window.top.location.pathname + "?" + window._sBodyFrame + "=" + sNewPath + sResourceName;
	var sArgs = framedWindow.location.search;
	if (sArgs.length > 0)
		sNewFrameSetPath += "&" + sArgs.substr(1);
	return sNewFrameSetPath;
}

function FrameSetNav_GoToNavURI(framedWindow)
{
	if (! FrameSetNav_FromNavURI(framedWindow))
		{
		var sNewFrameSetPath = FrameSetNav_GetNavURI(framedWindow);
		window.top.location.replace(sNewFrameSetPath);
		}
}

function FrameSetNav_FromNavURI(framedWindow)
{
	var sLoadedWindow = "";
	if (window._sLoadedWindow != null)
		sLoadedWindow = window._sLoadedWindow.toString();
	var sFramedWindow = framedWindow.location.pathname + framedWindow.location.search;
	var bSameURI = (sLoadedWindow == sFramedWindow);
	return bSameURI;
}