// calculate the ASCII code of the given character
function CalcKeyCode(aChar) 
{
	var character = aChar.substring(0,1);
	var code = aChar.charCodeAt(0);
	return code;
}
function checkDate(val) 
{
	var strPass = val.value;
	var strLength = strPass.length;
	var lchar = val.value.charAt((strLength) - 1);
	var cCode = CalcKeyCode(lchar);

	if (lchar == '-')
		{
		var resu = 'ok';	
		}		
	else if (cCode < 48 || cCode > 57 ) 
		{
		var myNumber = val.value.substring(0, (strLength) - 1);
		val.value = myNumber;
		}
return false;
}
function checkNumber(val) 
{
	var strPass = val.value;
	var strLength = strPass.length;
	var lchar = val.value.charAt((strLength) - 1);
	var cCode = CalcKeyCode(lchar);
	
	if (cCode < 48 || cCode > 57 ) 
		{
		var myNumber = val.value.substring(0, (strLength) - 1);
		val.value = myNumber;
		}
	return false;
}
function checkNumberCard(val) 
{
	var strPass = val.value;
	var strLength = strPass.length;
	var lchar = val.value.charAt((strLength) - 1);
	var cCode = CalcKeyCode(lchar);

	if (lchar == '*')
		{
		var resu = 'ok';	
		}		
	else if (cCode < 48 || cCode > 57 ) 
		{
		var myNumber = val.value.substring(0, (strLength) - 1);
		val.value = myNumber;
		}
return false;
}
function checkAmount(val) 
{
	var strPass = val.value;
	var strLength = strPass.length;
	var lchar = val.value.charAt((strLength) - 1);
	var cCode = CalcKeyCode(lchar);

	if (lchar == '.')
		{
		var resu = 'ok';	
		}		
	else if (cCode < 48 || cCode > 57 ) 
		{
		var myNumber = val.value.substring(0, (strLength) - 1);
		val.value = myNumber;
		}
return false;
}
// CONTROLE DATE 
var dtCh= "-";
var minYear=1900;
var maxYear=2100;

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(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("Entrez un mois valide")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Entrez un jour valide")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Entrez une année valide de 4 chiffres")
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Entrez une date valide")
		return false
	}
return true
}
function checkDateValide(val)
{
	var dt=val
	if (isDate(dt.value)==false)
		{
		dt.focus()
		return false
		}
    return true
}