function fontSizeup()
{
	active = getActiveStyleSheet();

	switch (active)
	{
		case 'StyleXS' : 
			setActiveStyleSheet('StyleS');
			break;
		case 'StyleS' : 
			setActiveStyleSheet('StyleM');
			break;
		case 'StyleM' : 
			setActiveStyleSheet('StyleL');
			break;
		case 'StyleL' : 
			setActiveStyleSheet('StyleXL');
			break;
		case 'StyleXL' :
			break;
		default :
			setActiveStyleSheet('StyleM');
			break;
	}
}

function fontSizedown()
{
	active = getActiveStyleSheet();

	switch (active)
	{
		case 'StyleXL' : 
			setActiveStyleSheet('StyleL');
			break;
		case 'StyleL' : 
			setActiveStyleSheet('StyleM');
			break;
		case 'StyleM' : 
			setActiveStyleSheet('StyleS');
			break;
		case 'StyleS' : 
			setActiveStyleSheet('StyleXS');
			break;
		case 'StyleXS' : 
			break;
		default :
			setActiveStyleSheet('StyleM');
			break;
	}
}

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

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

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 getPreferredStyleSheet()
{
	return ('StyleM');
}

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 cookie = readCookie("chosenStyle");
	var title = cookie ? cookie : getPreferredStyleSheet();

	setActiveStyleSheet(title);
}

window.onunload = function(e)
{
	var title = getActiveStyleSheet();

	createCookie("chosenStyle", title, 365);
}

var cookie = readCookie("chosenStyle");
var title = cookie ? cookie : getPreferredStyleSheet();

if (title == 'null')
{
	title = getPreferredStyleSheet();
}

setActiveStyleSheet(title);