// Code from JavaScript Guide ed5.
var browser = 
{
	version: parseInt(navigator.appVersion),
	isNetscape: navigator.appName.indexOf("Netscape") != -1, 
	isMicrosoft: navigator.appName.indexOf("Microsoft") != -1
};


// Event processing code from JavaScript & DHTML Cookbook ed2.
function addEvent(elem, evtType, func, capture)
{
	capture = (capture) ? capture : false;
	if (elem.addEventListener)
	{
		elem.addEventListener(evtType, func, capture);
	}
	else if (elem.attachEvent)
	{
		elem.attachEvent("on" + evtType, func);
	}
	else
	{
		// for IE/Mac, NN4, and older
		elem["on" + evtType] = func;
	}
}

function removeEvent(elem, evtType, func, capture)
{
	capture = (capture) ? capture : false;
	if (elem.removeEventListener)
	{
		elem.removeEventListener(evtType, func, capture);
	}
	else if (elem.attachEvent)
	{
		elem.detachEvent("on" + evtType, func);
	}
	else
	{
		// for IE/Mac, NN4, and older
		elem["on" + evtType] = null;
	}
}

function addOnLoadEvent(func)
{
	if (window.addEventListener || window.attachEvent)
	{
		addEvent(window, "load", func, false);
	}
	else
	{
		var oldQueue = (window.onload) ? window.onload : function() {};
		window.onload = function()
		{
			oldQueue();
			func();
		}
	}
}

// Return the available content width space in browser window
function getInsideWindowWidth ()
{
	if (window.innerWidth)
	{
		return window.innerWidth;
	}
	else if (document.documentElement && document.documentElement.clientWidth)
	{
		return document.documentElement.clientWidth;
	}
	else if (document.body && document.body.clientWidth)
	{
		return document.body.clientWidth;
	}
	return null;
}

// Return the available content height space in browser window
function getInsideWindowHeight ()
{
	if (window.innerHeight)
	{
		return window.innerHeight;
	}
	else if (document.documentElement && document.documentElement.clientHeight)
	{
		return document.documentElement.clientHeight;
	}
	else if (document.body && document.body.clientHeight)
	{
		return document.body.clientHeight;
	}
	return null;
}

// calculates the total position (offset) for an element - can accept string id or element object.
// return the position as an array with [x,y].
function getAbsPos (elem)
{
	if (typeof elem == "string") elem = document.getElementById(elem);
	
	var posx = 0;
	var posy = 0;
	if (elem.offsetParent)
	{
		posx = elem.offsetLeft;
		posy = elem.offsetTop;
		while (elem = elem.offsetParent)
		{
			posx += elem.offsetLeft;
			posy += elem.offsetTop;
		}
	}
	return [posx, posy];
}

// from "http://mentaljetsam.wordpress.com/2008/06/02/using-javascript-to-post-data-between-pages/"

// Takes a parameter map and post it to a link.
function postToLink (toPage, paramMap)
{
	var postForm = document.createElement("form");
	postForm.method="post";
	postForm.action = toPage;
	for (var pKey in paramMap)
	{
		var ithInput = document.createElement("input");
		ithInput.setAttribute("name", pKey);
		ithInput.setAttribute("value", paramMap[pKey]);
		postForm.appendChild(ithInput);
	}
	document.body.appendChild(postForm);
	postForm.submit();
	document.body.removeChild(postForm);
}