var Win =window.navigator.platform.indexOf('Win')==-1?false:true;
var Mac =window.navigator.platform.indexOf('Mac')==-1?false:true;
var Unix=window.navigator.platform.indexOf('X11')==-1?false:true;

var IE=window.navigator.appName.indexOf('Microsoft')==-1?false:true;
var NE=window.navigator.appName.indexOf('Netscape') ==-1?false:true;
var OP=window.navigator.appName.indexOf('Opera')    ==-1?false:true;

var Ver=parseInt(window.navigator.appVersion);

var DOM=document.getElementById?true:false;
var IE4=document.all?true:false;
var NT4=document.layer?true:false;

var Gecko=navigator.userAgent.toLowerCase().indexOf("gecko")!=-1?true:false;

function OpenLink(url) {
 var caratteristiche;
 caratteristiche="height=350, width=550, ";
 caratteristiche+="resizable=yes, location=yes, menubar=yes, scrollbars=yes, status=yes, toolbar=yes";
 window.open(url,'',caratteristiche);
 return false;
}

var MyFoto;
function photo(url, alt) {
 file="pages/popup/foto.php?a="+url+"&b="+alt;
 option="directory=no,fullscreen=no,menubar=no,resizable=yes,toolbar=no,";
 position="scrollbars=yes,screenX=0,screenY=0,top=0,left=0,";
 key=option+position+"width=500, height=450";
 if (MyFoto) {MyFoto.close();}
 MyFoto=window.open(file,'',key);
 return false;
}

var MyNews;
function news(id) {
 file="pages/popup/news.php?id="+id;
 option="directory=no,fullscreen=no,menubar=no,resizable=yes,toolbar=no,";
 position="scrollbars=yes,screenX=0,screenY=0,top=0,left=0,";
 key=option+position+"width=500, height=400";
 if (MyNews) {MyNews.close();}
 MyNews=window.open(file,'',key);
 return false;
}

function CheckForm(form)
{
 if (DOM)
 {
  textarea='ok'; inputText=0; rightInput=0;

  if (form.getElementsByTagName('textarea'))
  {
   textarea=form.getElementsByTagName('textarea');
   textarea=(textarea[0])?textarea[0].value:'ok';
  }

  input=form.getElementsByTagName('input');
  for (var x=0; x<input.length; x++)
  {
   if (input[x].type=='text')
   {
    rightInput++;
    testo=input[x].value;
    if (testo!='' || input[x].style.fontStyle=='italic') inputText++;
   }
  }

  if (textarea=='' || (inputText!=rightInput) )
  {
   alert("Bisogna compilare tutti i campi obbligatori");
   return false
  }

  return true;
 }

 return false;
}

function Faccina(nome)
{
 testo=document.guestbook.testo.value;
 document.guestbook.testo.value=testo+"["+nome+"]";
 document.guestbook.testo.focus();
}

function biografia(url)
{
 var caratteristiche;
 caratteristiche="height=500, width=400, ";
 caratteristiche+="resizable=yes, location=no, menubar=no, scrollbars=yes, status=no, toolbar=no";
 window.open(url,'',caratteristiche);
 return false;
}