/*
// <link href="${tg.url('/static/css/normal.css')}" rel="stylesheet" type="text/css" title="A" />
// <link href="${tg.url('/static/css/medium.css')}" rel="alternate stylesheet" type="text/css" title="A+" />
// <link href="${tg.url('/static/css/large.css')}" rel="alternate stylesheet" type="text/css" title="A++" />
*/

var CSS_STYLES = {
  'A': [['.tooglesize', {'font-size': '1em'}]],
  'A+': [['.tooglesize', {'font-size': '1.1em'}]],
  'A++': [['.tooglesize', {'font-size': '1.2em'}]]
}

var CSS_CURRENT = null;


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

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

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

		case 'A++':
		break;

		default:
			setActiveStyleSheet('A');
		break;
	}
}

function fontsizedown()
{
	active = getActiveStyleSheet();

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

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

		default :
			setActiveStyleSheet('A');
		break;
	}
}

function setActiveStyleSheet(title)
{
	 
	$(CSS_STYLES[title]).each(function(idx, item){
		$(item[0]).css(item[1]);
	});			
	
	CSS_CURRENT = title;
	
}

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 CSS_CURRENT;
}

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
	{
		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);
}