onload=function(){
	size=getCookie("fontsize");             //reperisce il cookie
	if(size!=null) SetFontSize(size);       //setta le impostazioni
	else SetFontSize('11px'); 
}

function SetFontSize(s){
	document.getElementsByTagName('body')[0].style.fontSize=s;
	setCookie("fontsize",s,30);
}

function setCookie(name, value, expdays) {   //memorizza il cookie
	var now = new Date();
	var exp = new Date(now.getTime() + (1000*60*60*24*expdays));
	document.cookie = name + "=" + escape(value) + ";" + "expires=" + exp.toGMTString() + ";" + "path=/";
}

function getCookie(name) {    //restituisce il cookie
	var cname = name + "=";
	var dc = document.cookie;
	if (dc.length > 0) {
		var start = dc.indexOf(cname);
		if (start != -1) {
			start += cname.length;
			var stop = dc.indexOf(";", start);
			if (stop == -1) stop = dc.length;
			return unescape(dc.substring(start,stop));
		}
	}
	return null;
}