function mediumFontSize()
{
	var titleOfActiveStyle = getActiveStyleSheet("fontsize");
	setActiveStyleSheet("Size:10pt","fontsize");
}

function decreaseFontSize(small,large)
{
	if(!small) { small = 'decrease'; }
	if(!large) { large = 'increase'; }

	var titleOfActiveStyle = getActiveStyleSheet("fontsize");

    if(titleOfActiveStyle == null)      
		titleOfActiveStyle = "Size:8pt";

	if(titleOfActiveStyle == "Size:10pt")
		setActiveStyleSheet("Size:9pt","fontsize");

	if(titleOfActiveStyle == "Size:9pt")
		setActiveStyleSheet("Size:8pt","fontsize");

	EnableDisbaleStyles(small,large)
}

function EnableDisbaleStyles(small,large)
{
	var titleOfActiveStyle = getActiveStyleSheet("fontsize");
	
	if(titleOfActiveStyle == "Size:8pt")
	{
		if(document.getElementById(small))
		{
			document.getElementById(small).style.display = 'none';
		}

		if(document.getElementById(large))
		{
			document.getElementById(large).style.display = 'block';
		}
	}
	else if(titleOfActiveStyle=="Size:10pt")
	{
		if(document.getElementById(small))
		{
			document.getElementById(small).style.display = 'block';
		}

		if(document.getElementById(large))
		{
			document.getElementById(large).style.display = 'none';
		}
	}
	else
	{
		if(document.getElementById(small))
			document.getElementById(small).style.display = 'block';

		if(document.getElementById(large))
			document.getElementById(large).style.display = 'block';
	}
}

function increaseFontSize(small,large)
{
	if(!small)
		small = 'decrease'
	if(!large)
		large = 'increase';

	var titleOfActiveStyle = getActiveStyleSheet("fontsize");

	if(titleOfActiveStyle == null)      
		titleOfActiveStyle = "Size:8pt";    
	if(titleOfActiveStyle == "Size:8pt")      
		setActiveStyleSheet("Size:9pt","fontsize");
	if(titleOfActiveStyle == "Size:9pt")
		setActiveStyleSheet("Size:10pt","fontsize");
	
	EnableDisbaleStyles(small,large)
}

function setActiveStyleSheet(title,type) {
	var i, a, main;

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

function isStyleSheetType(str,type) {
	if      (str == "")                             { return true; }
	else if (type == "fontsize" && str.match(/^Size/))    {return true;}
	else if (type == "weight" && str.match(/\Font/))    {return true;}
	else if (type == "contrast" && str.match(/^Back/))    {return true;}
	return false;
}

function getActiveStyleSheet(type) {
	var i, a;

	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && isStyleSheetType(a.getAttribute("title"),type) && !a.disabled) return a.getAttribute("title");
	}
	return null;
}

 

function getPreferredStyleSheet() {
	var i, a;

	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("rel").indexOf("alt") == -1 && a.getAttribute("title"))
			return a.getAttribute("title");
	}
	return null;
}

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*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 title = ""
	var cookie = readCookie("style");
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title,"fontsize");

	cookie = readCookie("wstyle");
	title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title,"weight");

	cookie = readCookie("cstyle");
	title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title,"contrast");
}

window.onunload = function(e) {
	var title = getActiveStyleSheet("fontsize");
	createCookie("style", title, 365);
	var title = getActiveStyleSheet("weight");
	createCookie("wstyle", title, 365);
	var title = getActiveStyleSheet("contrast");
	createCookie("cstyle", title, 365);
}
 
var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title,"fontsize");

var cookie = readCookie("cstyle");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title,"contrast");

var cookie = readCookie("wstyle");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title,"weight");