// Funzioni di validazione dei campi - Giulio Vezzelli, 2003
// Proprietà di Infolog S.r.l.

var dtCh= "/";
var minYear=1900;
var maxYear=2100;

var lightRed = "#FF7777";
var white="#FFFFFF";
var lightYellow="#FFFF77";

var valid = true;
          
function strtrim() {
  return this.replace(/^\s+/,'').replace(/\s+$/,'');
}

String.prototype.trim = strtrim;

function isInteger(s){
	var i;
  for (i = 0; i < s.length; i++){   
    // Check that current character is number.
    var c = s.charAt(i);
    if (((c < "0") || (c > "9"))) return false;
  }
  // All characters are numbers.
  return true;
}

function isDecimal(s){
	var i;
  for (i = 0; i < s.length; i++){   
    // Check that current character is number.
    var c = s.charAt(i);
    if (((c < "0") || (c > "9")) && c!="," && c!=".") return false;
  }
  // All characters are numbers.
  return true;
}


function stripCharsInBag(s, bag){
	var i;
  var returnString = "";
  // Search through string's characters one by one.
  // If character is not in bag, append to returnString.
  for (i = 0; i < s.length; i++){   
    var c = s.charAt(i);
    if (bag.indexOf(c) == -1) returnString += c;
  }
  return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
  // EXCEPT for centurial years which are not also divisible by 400.
  return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}

function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
    this[i] = 31
	  if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
	  if (i==2) {this[i] = 29}
  } 
  return this
}

function isDate(dtStr) {
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		// alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		// alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		// alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		// alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		// alert("Please enter a valid date")
		return false
	}
  return true
}

// Aggiunge automaticamente le barre a un campo data
function fixDate(obj) {
  val = obj.value.trim();
  if ((val.length == 2) || (val.length == 5)) {
    //alert(val.length);
    obj.value = val + "/";
  }
  return true
}

// Trasforma una data in un intero confrontabile
function dateToInteger(cDate) {
  var splitted = cDate.split('/');
  var nDay = splitted[0];
  var nMonth = splitted[1];
  var nYear = splitted[2];
  
  return parseInt(nYear + nMonth + nDay);
}

// Verifica la correttezza di una singola data obbligatoria
function checkSingleDate(dateField) {
  if (!dateCheck(dateField, true)) {
	  alert("Uno o più criteri di ricerca non sono corretti.");
		return false
  }
	else {
	  return true
  }
}

// Verifica la correttezza di un periodo tra due date
function checkPeriod(fromField, toField) {
  if ((!dateCheck(fromField)) || (!dateCheck(toField))) {
    alert("Uno o più criteri di ricerca non sono corretti.");
    return false
  }
  else {
    var fromValue, toValue
    fromValue = fromField.value.trim();
    toValue = toField.value.trim();
    
    if ((fromValue != "") && (toValue == "")) {
      toValue = fromValue
    }
    
    if ((dateToInteger(fromValue) <= dateToInteger(toValue)) || ((fromValue == "") && (toValue == ""))) {
      return true
    }
    else {
      alert("La data di inizio periodo è più recente della data di fine.");
      return false
    }
  }
}

//verifica obbligatorieta'
function mandatory(obj){
  val = obj.value.trim();
  if ((val == "")) {
    obj.style.backgroundColor = lightYellow;
    return false;
  }
  else{ 
    obj.style.backgroundColor = white;
    return true ;
  }
}

// Verifica campo Integer
function integerCheck(obj, mandatory) {
  val = obj.value.trim();
  if ((val == "") && (mandatory == true)) {
    // obj.focus();
    obj.style.backgroundColor = lightYellow;
    return false;
  }
  else {
    if (isInteger(val) == false){ 
  		// obj.focus(); 
      obj.style.backgroundColor = lightRed;
    	return false
	  }
    obj.style.backgroundColor = white;
    return true
  }
}


// Verifica campo Decimal
function decimalCheck(obj, mandatory) {
  val = obj.value.trim();
  if ((val == "") && (mandatory == true)) {
    obj.style.backgroundColor = lightYellow;
    return false;
  }
  else {
    if (isDecimal(val) == false){ 
      obj.style.backgroundColor = lightRed;
    	return false
	  }
    obj.style.backgroundColor = white;
    return true
  }
}

// Verifica campo Date
function dateCheck(obj, mandatory){
	val = obj.value.trim();
  if (val == "") {
    if (mandatory == true) {
      // obj.focus();
      obj.style.backgroundColor = lightYellow;
      return false;
    }
    else {
      obj.style.backgroundColor = white;
      return true;
    }
  }
  else {
    if (isDate(val) == false){ 
  		// obj.focus();
      obj.style.backgroundColor = lightRed;
    	return false
	  }
    obj.style.backgroundColor = white;
    return true
  }
}

function calcolaConsumo(obj){
  if(integerCheck(obj,true)){//prima controllo  che sia un numero
    val = obj.value.trim();
    val2=eval(val)*50;
    document.Nuovo.consumoAnnuo.value = val2;
  }
  else
    document.Nuovo.consumoAnnuo.value = 0;
  aggiorna();

}

function aggiorna(){
  document.Nuovo.action.value="aggiorna";
	document.Nuovo.Invia.click();
}


function abilitaSconto(){
  if(document.Nuovo.scontoManuale.checked==true)
    document.Nuovo.sconto.value=0;
  aggiorna();
}