var style = "default";       //title del css di default
var cookiename = "Layout";   //nome del cookie
var days = 30;               //durata in giorni del cookie

function switchStyle(s) {
  if (!document.getElementsByTagName) return;
  var el = document.getElementsByTagName("link");
  for (var i = 0; i < el.length; i++ ) {
    if (el[i].getAttribute("rel").indexOf("style") != -1 && el[i].getAttribute("title")) {
      el[i].disabled = true;
      if (el[i].getAttribute("title") == s) el[i].disabled = false;
    }
  }
}

function loadStyle() {
  var c = getStyleCookie();
  if (c && c != style) {
    switchStyle(c);
    style = c;
  }
}

function setStyle(s) {
  if (s != style) {
    switchStyle(s);
    style = s;
    setStyleCookie();        
  }
}

//window.onload = loadStyle;   // carica lo style swichter all' onload


// Funzioni di manipolazione dei cookie

function setCookie(name, value, expdays) {
  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 delCookie(name) {   // fa scadere il cookie
  var now = new Date();
  var exp = new Date(now.getTime() - 1);
  document.cookie = name + "=;" +
                    "expires=" + exp.toGMTString() + ";" + 
                    "path=/";
}

function getCookie(name) {   // restituisce il valore del 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;
}

function setStyleCookie() {
  setCookie(cookiename, style, days);
}

function getStyleCookie() {
  return getCookie(cookiename);
}

function delStyleCookie() {
  delCookie(cookiename);
}


// Stylesheet per Netscape 4
// necessita di un css a parte
if(document.layers)
  document.writeln("<link rel='stylesheet' type='text/css' href='/nn4.css' />");
  
  
   
  
  
/*======= cookie per testo===========*/
  
  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 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 setFontSize(size) {
	var body = document.getElementsByTagName('body')[0];
	var percentuale = "85%"; // default
	if (size == 1) percentuale = "85%";
	if (size == 2) percentuale = "120%";
	if (size == 3) percentuale = "140%";
	//if (size == 4) percentuale = "100%";
	//if (size == 5) percentuale = "110%";
	body.style.fontSize = percentuale;
	createCookie('TuoSitoFontSize',size,365);
}

window.onload = function() {
	size = readCookie('TuoSitoFontSize');
	setFontSize(size);    
    loadStyle();
}