function fontsizeup()
{
	var active = getActiveStyleSheet();

	switch (active)
	{
		case 'A-':
			setActiveStyleSheet('A');
		break;
		
		case 'A':
			setActiveStyleSheet('A+');
		break;

		case 'A+':
			setActiveStyleSheet('A++');
		break;
		
		case 'A++' : 
			setActiveStyleSheet('A++');
		break;
		
		default:
			setActiveStyleSheet('A');
		break;
	}
	
	createCookie('style_cookie', getActiveStyleSheet(), 365);

	return false;
}

function fontsizedown()
{
	var active = getActiveStyleSheet();

	switch (active)
	{
		case 'A++' : 
			setActiveStyleSheet('A+');
		break;

		case 'A+' : 
			setActiveStyleSheet('A');
		break;

		case 'A' : 
			setActiveStyleSheet('A-');
		break;
		
		case 'A-' : 
			setActiveStyleSheet('A-');
		break;

		default :
			setActiveStyleSheet('A');
		break;
	}
	
	createCookie('style_cookie', getActiveStyleSheet(), 365);

	return false;
}

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 ('A');
}

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 var 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;
}

function load_cookie()
{
	var cookie = readCookie('style_cookie');
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title);
}

function unload_cookie()
{
	var title = getActiveStyleSheet();
	createCookie('style_cookie', title, 365);
}

window.onload = load_cookie;