// JavaScript Document
function getCookieVal (offset) {
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
	endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie (name) {
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
		return getCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) 
		break; 
	}
	return null;
}

function SetCookie (name, value) {
	var argv = SetCookie.arguments;
	var argc = SetCookie.arguments.length;
	var expires = (2 < argc) ? argv[2] : null;
	var path = (3 < argc) ? argv[3] : '/internet/';
	var domain = (4 < argc) ? argv[4] : null;
	var secure = (5 < argc) ? argv[5] : false;
	document.cookie = name + "=" + escape (value) +
	((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
	((path == null) ? "" : ("; path=" + path)) +
	((domain == null) ? "" : ("; domain=" + domain)) +
	((secure == true) ? "; secure" : "");
}

function SettaCarattere() {
	var i=0;
 	var arrElementi = self.document.body.getElementsByTagName("div");
	while ( i<arrElementi.length ) {
		if ( arrElementi[i].id == 'areaSensibile' ) {
			if (GetCookie(arrElementi[i].id) != null) {
				var classe = arrElementi[i].className;
				arrElementi[i].className = GetCookie(arrElementi[i].id);
			}
		}
	i++;
	}
}

function cambiaCarattere(nomeClasse){
 	var i=0;
 	var arrElementi = self.document.body.getElementsByTagName("div");
	while ( i<arrElementi.length ) {
		if (arrElementi[i].id == "areaSensibile" ) {
			arrElementi[i].className = nomeClasse;
			
			clearCookie();
			SetCookie( "areaSensibile" , nomeClasse);
		}
	i++;
	}
}

function clearCookie() {

	var expirationDate = new Date();
	var currYear = expirationDate.getYear();

	expirationDate.setYear(currYear - 1);
	expirationDate = expirationDate.toGMTString();

	var dc = document.cookie;
	var tempString = "";
	var tempChar;
	var i = 0;
	var cookieLength = dc.length;

	while (i < cookieLength) {
		tempChar = dc.charAt(i);
		if (tempChar == "_") {
			tempString = dc.charAt(i-1) + tempChar + dc.charAt(i+1)
			document.cookie = tempString + "=null; expires= " + expirationDate;
		}
	i++;	
	}
}	

window.onload = function(e) {
  SettaCarattere();
}