function getElements() {
	var re = new RegExp('(^| )'+'niceform'+'( |$)');
	for (var nf = 0; nf < document.getElementsByTagName('form').length; nf++) {
		if(re.test(niceforms[nf].className)) {
			for(var nfi = 0; nfi < document.forms[nf].getElementsByTagName('input').length; nfi++) {inputs.push(document.forms[nf].getElementsByTagName('input')[nfi]);	}
			for(var nfl = 0; nfl < document.forms[nf].getElementsByTagName('label').length; nfl++) {labels.push(document.forms[nf].getElementsByTagName('label')[nfl]);}
			for(var nft = 0; nft < document.forms[nf].getElementsByTagName('textarea').length; nft++) {textareas.push(document.forms[nf].getElementsByTagName('textarea')[nft]);}
			for(var nfs = 0; nfs < document.forms[nf].getElementsByTagName('select').length; nfs++) {selects.push(document.forms[nf].getElementsByTagName('select')[nfs]);}
		}
	}
}
//separating all the elements in their respective arrays
function separateElements() {
	var r = 0; var c = 0; var t = 0; var rl = 0; var cl = 0; var tl = 0; var b = 0;
	for (var q = 0; q < inputs.length; q++) {
		if(inputs[q].type == 'radio') {
			radios[r] = inputs[q]; ++r;
			for(var w = 0; w < labels.length; w++) {if(labels[w].htmlFor == inputs[q].id) {if(inputs[q].checked) {labels[w].className = "chosen";} radioLabels[rl] = labels[w]; ++rl;}}
		}
		if(inputs[q].type == 'checkbox') {
			checkboxes[c] = inputs[q]; ++c;
			for(var w = 0; w < labels.length; w++) {if(labels[w].htmlFor == inputs[q].id) {if(inputs[q].checked) {labels[w].className = "chosen";} checkboxLabels[cl] = labels[w]; ++cl;}}
		}
		if((inputs[q].type == "text") || (inputs[q].type == "password")) {texts[t] = inputs[q]; ++t;}
		if((inputs[q].type == "submit") || (inputs[q].type == "button")) {buttons[b] = inputs[q]; ++b;}
	}
}

function replaceTextareas() {
	for(var q = 0; q < textareas.length; q++) {
		textareas[q].onfocus = function() {
			this.className = "textAreaSelect";
		}
		textareas[q].onblur = function() {
			this.className = "textAreaNormale";
		}
	}
}

function replaceTexts() {
	for(var q = 0; q < texts.length; q++) {
		texts[q].onfocus = function() {
			this.className = "inputSelect";
		}
		texts[q].onblur = function() {
			this.className = "inputNormale";
		}
	}
}

function returnObjById( id ) 
{ 
    if (document.getElementById) 
        var returnVar = document.getElementById(id); 
    else if (document.all) 
        var returnVar = document.all[id]; 
    else if (document.layers) 
        var returnVar = document.layers[id]; 
    return returnVar; 
}

function visibile (i){
returnObjById('1select').style.display='none';
returnObjById('2select').style.display='none';
returnObjById('3select').style.display='none';
returnObjById('4select').style.display='none';
returnObjById('5select').style.display='none';
if (i!='0') {
	returnObjById(i+'select').style.display='block';
}
}

function numeralsOnly(evt) {
evt = (evt) ? evt : event;
var charCode = (evt.charCode) ? evt.charCode : ((evt.keyCode) ? evt.keyCode 
: ((evt.which) ? evt.which : 0));
if (charCode> 31 && (charCode < 48 || charCode> 57)) {
return false;
}
return true;
}

function lettersOnly(evt) {
evt = (evt) ? evt : event;
var charCode = (evt.charCode) ? evt.charCode : ((evt.keyCode) ? evt.keyCode 
: ((evt.which) ? evt.which : 0));
if (charCode> 31 && (charCode < 65 || charCode> 90) &&
(charCode < 97 || charCode> 122)) {
return false;
}
return true;
}

function ControllaCF(cf)
{
	var validi, i, s, set1, set2, setpari, setdisp;
	if( cf == '' )  return '';
	cf = cf.toUpperCase();
	if( cf.length != 16 )
		return "La lunghezza del codice fiscale non è\n"
		+"corretta: il codice fiscale dovrebbe essere lungo\n"
		+"esattamente 16 caratteri.\n";
	validi = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
	for( i = 0; i < 16; i++ ){
		if( validi.indexOf( cf.charAt(i) ) == -1 )
			return "Il codice fiscale contiene un carattere non valido `" +
				cf.charAt(i) +
				"'.\nI caratteri validi sono le lettere e le cifre.\n";
	}
	set1 = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	set2 = "ABCDEFGHIJABCDEFGHIJKLMNOPQRSTUVWXYZ";
	setpari = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	setdisp = "BAKPLCQDREVOSFTGUHMINJWZYX";
	s = 0;
	for( i = 1; i <= 13; i += 2 )
		s += setpari.indexOf( set2.charAt( set1.indexOf( cf.charAt(i) )));
	for( i = 0; i <= 14; i += 2 )
		s += setdisp.indexOf( set2.charAt( set1.indexOf( cf.charAt(i) )));
	if( s%26 != cf.charCodeAt(15)-'A'.charCodeAt(0) )
		return "Il codice fiscale non è corretto:\n"+
			"il codice di controllo non corrisponde.\n";
	return "";
}

function controllaNum(valore,msg,msg2,obbligatorio)
{
		if (obbligatorio!=0) {
			 if ( valore == "" )
			 {
					alert(msg);
					return false;
			 }
		}
         var cifre= "0123456789.";
         var verifica= valore;
         var allValid = true;

         var allNum = "";
         for ( i = 0; i < verifica.length; i++ )
         {
                ch = verifica.charAt( i );
                for ( j = 0; j < cifre.length; j++ )
                 if ( ch == cifre.charAt( j ))
                        break;
                if ( j == cifre.length )
                {
                 allValid = false;
                 break;
                }
                allNum += ch;
         }
         if (!allValid)
         {
                alert( msg2 );
                cap.focus();
                return false;
         }
        return ( true );
}

function indirizzoEmailValido(indirizzo) {
  if (window.RegExp) {
    var nonvalido = "(@.*@)|(\\.\\.)|(@\\.)|(\\.@)|(^\\.)";
    var valido = "^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$";
    var regnv = new RegExp(nonvalido);
    var regv = new RegExp(valido);
    if (!regnv.test(indirizzo) && regv.test(indirizzo))
      return true;
    return false;
	}
  else {
    if(indirizzo.indexOf("@") >= 0)
      return true;
    return false;
  	}
  };