//rilevo SO e Browser
SOWIN = (navigator.userAgent.toLowerCase().indexOf("win") > -1) ? 1 : 0;
SOMAC = (navigator.userAgent.toLowerCase().indexOf("mac") > -1) ? 1 : 0;
SOLIN = (navigator.userAgent.toLowerCase().indexOf("linux") > -1) ? 1 : 0;
SOALT = (!SOWIN && !SOMAC && !SOLIN) ? 1 : 0;
OP = ((ind1 = navigator.userAgent.indexOf("Opera")) > -1) ? 1 : 0;
punto = (OP) ? navigator.userAgent.indexOf(".",ind1):0;
OP5 = (OP && parseInt(navigator.userAgent.substr(punto-1)) == 5) ? 1 : 0;
OP6 = (OP && parseInt(navigator.userAgent.substr(punto-1)) == 6) ? 1 : 0;
IE = ((ind2 = navigator.appVersion.indexOf("MSIE")) > -1 && !OP) ? 1 : 0;
IE4 = (IE && parseInt(navigator.appVersion.substr(ind2+5)) == 4) ? 1 : 0;
IE5 = (IE && parseInt(navigator.appVersion.substr(ind2+5)) == 5) ? 1 : 0;
IE6 = (IE && parseInt(navigator.appVersion.substr(ind2+5)) == 6) ? 1 : 0;
NN = (navigator.appName.indexOf("Netscape")>-1) ? 1 : 0;
NN4 = (NN && parseInt(navigator.appVersion)==4) ? 1 : 0;
NN6 = (NN && parseInt(navigator.appVersion)>4) ? 1 : 0;
GE = (navigator.userAgent.toLowerCase().indexOf("gecko")>-1) ? 1 : 0;
//riconosce mozilla, NN6 e tutti i browser basati sul gecko layout engine

/*
* PROTOTYPE
*/
String.prototype.equalsIgnoreCase = matchIgnoreCase;
function matchIgnoreCase(strTerm) {
    var strToSearch = this.toLowerCase();
    strTerm = strTerm.toLowerCase();
    if (strToSearch==strTerm)
        return true
    else
        return false
}

String.prototype.trim = function(){ return this.replace(/^\s+|\s+$/g,'') }

//function trimString(sInString) {
//	sInString = sInString.replace( /^\s+/g, "" );// strip leading
//	return sInString.replace( /\s+$/g, "" );// strip trailing
//}

RegExp.escape = function(text) {
  if (!arguments.callee.sRE) {
    var specials = [
      '/', '.', '*', '+', '?', '|',
      '(', ')', '[', ']', '{', '}', '\\'
    ];
    arguments.callee.sRE = new RegExp(
      '(\\' + specials.join('|\\') + ')', 'g'
    );
  }
  return text.replace(arguments.callee.sRE, '\\$1');
}

function JWM_swapImage() {
	a = JWM_swapImage.arguments;
	document.JWM_tmp = new Array;
	j=0;
	for (i=0;i<(a.length-1);i+=2) {
		x = document.getElementById(a[i]);
		document.JWM_tmp[j++] = x;
		if(!x.oSrc) x.oSrc=x.src;
		x.src = a[i+1];
	}
}

function JWM_swapImgRestore() {
	a = document.JWM_tmp;
	for (i=0;a&&i<a.length&&a[i].oSrc;i++)
		a[i].src = a[i].oSrc;
}

//aggiunge il parametro specificato alla querystring
function addParameter(nome,valore) {
  for (var l = 0; l < document.links.length; l++) {
    var abslink = document.links[l].href.indexOf("http://");
    var intlink = document.links[l].href.indexOf("#");
    var jslink = document.links[l].href.indexOf("javascript:");  //forse va trattato!!!!
    var jwmlink = document.links[l].href.indexOf("http://");   //forse č meglio aggiungere il nome dell'applicazione
    var isjsp = (document.links[l].href.indexOf(".jsp")!=-1)?true:false;
    var separatore = (document.links[l].href.indexOf("?")!=-1)?"&":"?";

    if (intlink==-1 && jslink==-1 && jwmlink!=-1 && isjsp)
      document.links[l].href += separatore+nome+"="+valore;
  }
}

//ritorna undefined se il parametro non č definito
function getParameter(nome) {

   var url = window.location.href;
   var paramsStart = url.indexOf("?");
   if (paramsStart != -1) {
      var paramString = url.substr(paramsStart + 1);
      var tokenStart = paramString.indexOf(nome);

      if (tokenStart != -1) {
         paramToEnd = paramString.substr(tokenStart + nome.length + 1);
         var delimiterPos = paramToEnd.indexOf("&");

         if (delimiterPos == -1) {
            return paramToEnd;
         } else {
            return paramToEnd.substr(0, delimiterPos);
         }
      }
   }
}

function getParameters() {
   var params = new Array();
   var url = window.location.href;
   var paramsStart = url.indexOf("?");
   var hasMoreParams = true;

   if (paramsStart != -1) {
     var paramString = url.substr(paramsStart + 1);
     var params = paramString.split("&");
     for (var i = 0 ; i < params.length ; i++) {
       var pairArray = params[i].split("=");
       if (pairArray.length == 2) {
         params[pairArray[0]] = pairArray[1];
       }
     }
     return params;
   }
}

function getAttributo(el,attr,isselect) {
  retval = document.getElementById(el)

  if (retval) {
    if (isselect)
      return eval("retval.options[retval.selectedIndex]."+attr)
    else
      return eval("retval."+attr)
  }
}

function vai(desturl, repl) {
  if (desturl && desturl!="") {
    if (repl)
      document.location.replace(desturl)
    else
      document.location = desturl
  }
}

//funzione per "nascondere" un layer
function hideLayers() {
  //compatibilitą: Netscape 6.x, Explorer 5 e 6, Opera 5 e 6, Mozilla
  a = hideLayers.arguments;
  for (i=0;i<a.length;i++) {
    if (document.getElementById(a[i])) {
      //document.getElementById(a[i]).style.visibility="hidden";
      document.getElementById(a[i]).style.display="none";
    }
  }
}

//rende visibile un layer
function showLayers() {
  //compatibilitą: Netscape 6.x, Explorer 5 e 6, Opera 5 e 6, Mozilla
  a = showLayers.arguments;
  for (i=0;i<a.length;i++) {
    if (document.getElementById(a[i])) {
      //document.getElementById(a[i]).style.visibility="visible";
      document.getElementById(a[i]).style.display="block";
    }
  }
}



/***********************************************
* Bookmark site script- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
***********************************************/
// SCRIPT FOR ALLOWING THE USER TO EASILY BOOKMARK YOUR SITE, BY CLICKING ON A LINK ON THE PAGE.
function bookmarkSite(title, url) {
	if (window.sidebar)
	{
		// firefox
		window.sidebar.addPanel(title, url, "");
	}
	else if (window.opera && window.print)
	{
		// opera
		var elem = document.createElement('a');
		elem.setAttribute('href',url);
		elem.setAttribute('title',title);
		elem.setAttribute('rel','sidebar');
		elem.click();
	}
	else if (document.all)
	{
		// ie
		window.external.AddFavorite(url, title);
	}
}

// RITORNA IL RIFERIMENTO ALL'OGGETTO FLASH
function getFlashObject(flashObjectId) {
	var oFlash;

	if (window.document[flashObjectId])
	{
		oFlash = window.document[flashObjectId];
	}
	if (navigator.appName.indexOf("Microsoft Internet") == -1)
	{
		if (document.embeds && document.embeds[flashObjectId])
		{
			oFlash = document.embeds[flashObjectId];
		}
	}
	else
	{
		oFlash = document.getElementById(flashObjectId);
	}

	return oFlash;
}

// conta il max numero di caratteri di una textarea e visualizza nel campo countfield il numero di caratteri ancora permessi
function textCounter( field, countfield, maxlimit ) {

	if (!field || !countfield || !maxlimit) return true;

  if ( field.value.length > maxlimit )
  {
    field.value = field.value.substring( 0, maxlimit );
    // TODO: resource bundle
    alert('Il numero massimo di caratteri permesso č ' + maxlimit + ' per questo campo' );
    return false;
  }
  else
  {
    countfield.value = maxlimit - field.value.length;
  }
}




/*
* JWM
*/

// RICERCA NEL SITO
function cerca(form, id, error) {
	if (document.getElementById(id).value.trim() == '')
	{
		alert(error)
	}
	else
	{
		document.forms[form].submit();
	}
}

// RICERCA EVENTI
function cercaEv(fnome) {
  var campot=document.getElementById('ev_tema');
  document.getElementById('n_tema').value=campot.options[campot.selectedIndex].text;
  var campod=document.getElementById('ev_dest');
  document.getElementById('n_dest').value=campod.options[campod.selectedIndex].text;
  var campom=document.getElementById('ev_mese');
  document.getElementById('n_mese').value=campom.options[campom.selectedIndex].text;
  document.forms[fnome].submit();
}

//ritorna true se una variabile o una funzione č definita
function isdefined( variable)
{
    return (typeof(window[variable]) == "undefined")?  false: true;
}