function setActiveStyleSheet(title) {
	var i, a, main;
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) 
	{
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) 
		{
			a.disabled = true;
			if(a.getAttribute("title") == title) 
			{
				/*
				if (title == "style_high_contrast")
				{
					var links=document.getElementsByTagName('A');
					calExp = new RegExp("imgmenu");
					srcExp = new RegExp("home.png");
					for (var i=0;i<links.length;i++) 
					{
						if (links[i].class.match(calExp)) 
						{
							links[i].href="javascript:void(0);";
							links[i].firstChild.src = links[i].firstChild.src.replace(srcExp, "home-hc.png");
						}
					}
				}
				*/
				a.disabled = false;
			}
		}
	};
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
	if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

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;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);

function setFontSize(size) {
	var body = document.getElementsByTagName('body')[0];
	var percentuale = "0";
	if (size == 1) percentuale = "";
	if (size == 2) percentuale = "87.5%";
	if (size == 3) percentuale = "100%";
	body.style.fontSize = percentuale;
	createCookie('fontUtente',size,365);
}

function OpenNewWindow() {
	window.open('http://www.sistimb.it', 'blank');
}

function ChangeContentTypeToText() {
	http.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );
	http.setRequestHeader('Content-Type', 'text/plain');
}

function hov(loc, cls)
{
	if (loc.className)
		loc.className = cls;
}