function Trim(s) 
{
  // Remove leading spaces 
  
  while (s.substring(0,1) == ' ')
  {
    s = s.substring(1,s.length);
  }

  // Remove trailing spaces 

  while (s.substring(s.length-1,s.length) == ' ')
  {
    s = s.substring(0,s.length-1);
  }
  return s;
}

function verify(element1)

 {
  var passed=false
  var s = Trim(element1.value);
   if (s=='' || s.length<4)

   {
    alert("La dénomination doit dépasser quatre caractères !")
    element1.focus();
    } 

   else
   passed=true
   return passed
 }
 
 
function exist(element1)

 {
  var passed=false
  var s = Trim(element1.value);
   if (s=='')

   {
    alert("Veuillez renseigner les champs obligatoires")
    element1.focus();
    } 

   else
   passed=true
   return passed
 } 
 
 function verifyNumber(element)
 {  if (isNaN(element.value) == true)
   {
      alert("Entrez un nombre valide SVP !");
      element.focus();
      element.select();
   }
}



////// VERIFICATION DE LA DATE 

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 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(fie){
  var dtStr = Trim(fie.value);
  fie.value= dtStr;
  var dtCh= "-";
	var minYear=1800;
	var maxYear=3000;
	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 (dtStr=="")
    return true;
    
	if (pos1==-1 || pos2==-1){
		alert("Veuillez saisir une date sous format : jj-mm-aaaa")
    fie.focus();
    fie.select();
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Veuillez saisir un mois valide")
    fie.focus();
    fie.select();
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Veuillez saisir un mois valide")
    fie.focus();
    fie.select();
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Veuillez saisir une année valide")
    fie.focus();
    fie.select();
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
    fie.focus();
    fie.select();
		return false
	}
return true
}

////////// FIN VERIFICATION DE LA DATE