$(document).ready(function() {
	
	var lfbsize = readCookie("lfbsize");
	if (lfbsize) { 
		fontSize(lfbsize);
	}
	
	$("a.small").click(

		function() {
			fontSize("80%");
		}
	
	);
	
	$("a.medium").click(

		function() {
			fontSize("100%");
		}
	
	);
	
	$("a.large").click(

		function() {
			fontSize("120%");
		}
	
	);
	
});

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 fontSize(size) {
	$("body").css("font-size", size);
	if (size=="80%") { $("a.small").addClass("selected"); $("a.medium").removeClass("selected"); $("a.large").removeClass("selected"); }
	else if (size=="100%") { $("a.medium").addClass("selected"); $("a.small").removeClass("selected"); $("a.large").removeClass("selected"); }
	else if (size=="120%") { $("a.large").addClass("selected"); $("a.small").removeClass("selected"); $("a.medium").removeClass("selected"); }
	createCookie("lfbsize", size, 30);
}