function font_init()
{
	if (readCookie('cfs') != null){
		s$('content').style.fontSize = readCookie('cfs') + 'px';
	}
} 

function font_resize(direction)
{
	if (direction == undefined) direction = '+';
	var cur_size = parseInt(getStyle(s$('content'),'font-size'));
	var min_size = 10;
	var max_size = 18;
	if (direction == '-' && cur_size > min_size){
		cur_size--;
		s$('content').style.fontSize = cur_size + 'px';
		set_font_cookie(cur_size);
	}
	if (direction == '+' && cur_size < max_size){
		cur_size++;
		s$('content').style.fontSize = cur_size + 'px';
		set_font_cookie(cur_size);
	}
}

function set_font_cookie(cur_size)
{
	createCookie('cfs', cur_size, 30);
}

// -- Cookies

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 eraseCookie(name)
{
	createCookie(name, '', -1);
}