function show_hide(elemento) {
	var el = document.getElementById(elemento);
	if (el != null) 	{
		if (el.style.display != 'none')
			el.style.display = 'none';
		else
			el.style.display = 'block';
	}
	createCookie(elemento,el.style.display,365);
}

function ToggleImage(imgId, img_block, img_none) {
	var d = document.getElementById(imgId);
	var i = document.getElementById("img_"+imgId);
	if (i != null) {
		if (d.style.display != "none")
			i.src = img_block;
		else
			i.src = img_none;
	}
}

/*newsletter*/
 function newsletter() {
	var ti = document.news.titolo.value;
	var te = document.news.testo.value;
	if ((ti == "" ))
		{
		   alert("E' necessario indicare un titolo");
		   document.news.titolo.value = "";
		   document.news.titolo.focus();
		   return false;
		}
	else if ((te == "" ))
		{
		   alert("E' necessario scrivere un testo");
		   document.news.testo.value = "";
		   document.news.testo.focus();
		   return false;
		}

		   else{
		   alert("Questo script impiegherą del tempo per inviare tutte le email, attendere senza fare altre operazioni");
           document.news.action = "newsletter.php";
           document.news.submit();
		}
	}


/*newsletter*/
function risposta() {
	var te = document.risp.testo_risposta.value;
	if ((te == "" ))
		{
		   alert("E' necessario inserire una risposta");
		   document.risp.testo_risposta.value = "";
		   document.risp.testo_risposta.focus();
		   return false;
		}
	else{
           document.risp.action = "domanda.php";
           document.risp.submit();
		}
	}


// JavaScript Document<!--

// ----------------------------------------------
// StyleSwitcher functions written by Paul Sowden
// http://www.idontsmoke.co.uk/ss/
// - - - - - - - - - - - - - - - - - - - - - - -
// For the details, visit ALA:
// http://www.alistapart.com/stories/alternate/

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) 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 preloadImages() {
  var d=document; if(d.images){ if(!d.p) d.p=new Array();
    var i,j=d.p.length,a=preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.p[j]=new Image; d.p[j++].src=a[i];}}
}