var defSize = 13;
var maxSize = 21;

function setCookie(name, value) {
	var curCookie = name + "=" + escape(value) + ";" // path=/; domain=alliwaa.com";
	document.cookie = curCookie;
	window.location.href = window.location.href;
}
 
function setFontCookie(name, value) {

	if ( parseInt(value) <= maxSize && parseInt(value) >= defSize) {
			var curCookie = name + "=" + escape(value) + ";" //path=/; domain=alliwaa.com";
		document.cookie = curCookie;
		window.location.href = window.location.href;
	}
	
}
 function getCookie(name) {
	var dc = document.cookie;
	var prefix = name + "=";
	var begin = dc.indexOf("; " + prefix);
	if (begin == -1) {
		begin = dc.indexOf(prefix);
		if (begin != 0) return null;
	} else
		begin += 2;
	var end = document.cookie.indexOf(";", begin);
	if (end == -1)
	end = dc.length;
	return unescape(dc.substring(begin + prefix.length, end));
}


function changeFontSize (fontsizedif) {
	if (fontsizedif == 0) {
		setFontCookie('fontsize', defSize);
	}
	else {
		if (getCookie('fontsize') == null) {
			var tmpfontsize = defSize;
		} else {
			var tmpfontsize = getCookie('fontsize');
		}
		var total = parseInt(tmpfontsize) + parseInt(fontsizedif)
		if (total > maxSize) {
			total = maxSize;
		}
		if (total < defSize) {
			total = defSize;
		} 
		setFontCookie('fontsize',total);
	}
}