// JavaScript Document
function resizeText(multiplier)
{
	if (document.body.style.fontSize == "")
	{
		document.body.style.fontSize = ".88em";
	}
	var floatCurrentFontSize = parseFloat(document.body.style.fontSize);
	var floatNewFontSize = floatCurrentFontSize + (multiplier * 0.05);
	if (!isNavTextWidthRemaining())
	{
		var cookie = get_cookie("computedVisualSize");
		var computedVisualSize = floatCurrentFontSize * 1.33;
		var newSize;
		if (cookie == null)
		{
			newSize = (computedVisualSize / floatNewFontSize);
			document.cookie = "computedVisualSize=" + computedVisualSize;
		}
		else
		{
			newSize = (cookie / floatNewFontSize);
		}

		newSize = roundNumber(newSize, 3);
		var listItems = document.getElementsByName("navLinks");
		for (var i = 0; i < listItems.length; i++)
		{
			listItems[i].style.fontSize = newSize + "em";
		}

	}
	else
	{
		delete_cookie("computedVisualSize");
	}
	document.body.style.fontSize = floatNewFontSize + "em";
}



function isNavTextWidthRemaining()
{
	var navtextUl = document.getElementById("navtext_ul");
	var width = 0;
	var windowWidth = getWindowWidth();
	var navtextUlWidth = navtextUl.clientWidth > 0 ? navtextUl.clientWidth : navtextUl.offsetWidth;
	for (var i = 0; i < navtextUl.childNodes.length; i++)
	{
		if (navtextUl.childNodes[i].clientWidth != null)
		{
			width = width + parseInt(navtextUl.childNodes[i].clientWidth);
		}
	}
	width = width * 1.05;
	if (width > windowWidth || width > navtextUlWidth)
	{
		return false;
	}
	else
	{
		return true;
	}
}

function getWindowWidth()
{
	var windowWidth = 0;
	if (typeof (window.innerWidth) == 'number')
	{
		windowWidth = window.innerWidth;
	}
	else
	{
		if (document.documentElement && document.documentElement.clientWidth)
		{
			windowWidth = document.documentElement.clientWidth;
		}
		else
		{
			if (document.body && document.body.clientWidth)
			{
				windowWidth = document.body.clientWidth;
			}
		}
	}
	return windowWidth;
}


function resetText()
{
	document.body.style.fontSize = ".88em";
	var listItems = document.getElementsByName("navLinks");
	for (var i = 0; i < listItems.length; i++)
	{
		listItems[i].style.fontSize = "1.33em";
	}
}

function get_cookie ( cookie_name )
{
  var results = document.cookie.match ( '(^|;) ?' + cookie_name + '=([^;]*)(;|$)' );

  if ( results )
    return ( unescape ( results[2] ) );
  else
    return null;
}

function delete_cookie(cookie_name)
{
	var cookie_date = new Date();  // current date & time
	cookie_date.setTime(cookie_date.getTime() - 1);
	document.cookie = cookie_name += "=; expires=" + cookie_date.toGMTString();
}

function roundNumber(num, dec) {
	var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);
	return result;
}

/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/	
var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};