var myKey;
function docOnKeypress(evt)
{
	var e = evt? evt : window.event;
	if(!e) 
		return;
	var key = 0;
	if (e.keyCode) 
	{ 
		myKey = e.keyCode; 
	} 
	else if (typeof(e.which)!= 'undefined') 
	{ 
		myKey = e.which; 
	}
}	
	
function GetElement(sElementName)
{
	var oElement;
	
	if(document.getElementById)
	{
		oElement = document.getElementById(sElementName);
	}
	else if(document.all)
	{
		oElement = document.all(sElementName);
	}
	else
		return null;
		
	return oElement;
}

function ChangeFontSize(StyleSheet)
{
	active = getActiveStyleSheet();
	setActiveStyleSheet(StyleSheet);
	SetSelectedFontCssClass();
}

function SetSelectedFontCssClass()
{
	var sCss	=  getActiveStyleSheet();
	var oNormal =  GetElement("FontNormal");
	var oLarge  =  GetElement("FontLarge");
	var oAccessible = GetElement("AccessibleFont")
	
	if(oNormal && oLarge)
	{
		if(sCss == "Large")
		{
			oLarge.className	= "Large Selected";
			oNormal.className	= "Normal";
			oAccessible.className = "Accessible";
		}
		else if (sCss == "Normal")
		{
			oLarge.className	= "Large";
			oNormal.className	= "Normal Selected";
			oAccessible.className = "Accessible";
		}
		else
		{
			oLarge.className	= "Large";
			oNormal.className	= "Normal";
			oAccessible.className = "Accessible Selected";
		}
	}
}


function setActiveStyleSheet(title) 
{
	var i, a, main;
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) 
	{
		//alert(a.getAttribute("rel").indexOf("style"));
		//alert(a.getAttribute("title"))
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) 
		{
			a.disabled = true;
			if(a.getAttribute("title") == title) 
				a.disabled = false;
		}
	}
}

function getPreferredStyleSheet() {
		  return ('A-');
		}

function getActiveStyleSheet() 
{
	var i, a;
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) 
	{
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) 
			return a.getAttribute("title");
	}
	return null;
}
function createCookie(name,value,days) 
{
	if (days) 
	{
		var date = new Date();
		date.setTime(date.getTime()+(days*22*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}
function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
	var c = ca[i];
	while (c.charAt(0)==' ') c = c.substring(1,c.length);
	if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

window.onload = function(e) {
	var cookie = readCookie("NB_CSS");
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title);
	document.onkeypress = docOnKeypress;
	
}
window.onunload = function(e) {
	var title = getActiveStyleSheet();
	createCookie("NB_CSS", title, 365);
}

var cookie = readCookie("NB_CSS");
var title = cookie ? cookie : getPreferredStyleSheet();
if (title == 'null') {
	title = getPreferredStyleSheet();
}

setActiveStyleSheet(title);
SetSelectedFontCssClass();