// Cookie functions

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);
}
$(function() {
	if(readCookie('fontSize')) {
		$('body').css('fontSize', parseInt(readCookie('fontSize')) + 'px');
	}
	$('li.plus a').click(function() {
		if(readCookie('fontSize')) {
			if (readCookie('fontSize') <= 17) {
				$('body').css('fontSize', (parseInt(readCookie('fontSize')) + 1) + 'px');
				createCookie('fontSize', parseInt(readCookie('fontSize')) + 1);
			}
		} else {
			$('body').css('fontSize', '13px');
			createCookie('fontSize', 13);
		}
		return false;
	});
	$('li.minus a').click(function() {
		if(readCookie('fontSize')) {
			if (readCookie('fontSize') >= 10) {
			$('body').css('fontSize', (parseInt(readCookie('fontSize')) - 1) + 'px');
			createCookie('fontSize', parseInt(readCookie('fontSize')) - 1);
			}
		} else {
			$('body').css('fontSize', '11px');
			createCookie('fontSize', 11);
		}
		return false;
	});	
});