// -----------------------------------------------------------------------------------------
// DATE VALIDATION
// Declaring valid date character, minimum year and maximum year
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,lang){
	/*var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strYear=dtStr.substring(pos2+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)*/
	lang=1
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strYear=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strDay=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){
		if  (lang==1)  {
			alert("Die datum formaat moet so wees : JJJJ/MM/DD")
		}else{
			alert("The date format should be : yyyy/mm/dd")
		}
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		if  (lang==1)  {
			alert("Kies asb 'n geldige maand")
		}else{
			alert("Please choose a valid month")
		}
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		if  (lang==1)  {
			alert("Kies asb 'n geldige dag")
		}else{
			alert("Please choose  a valid day")
		}
		return false
	}
	if (strYear.length != 4 || year==0){
		if  (lang==1)  {
			alert("Kies asb die jaar")
		}else{
			alert("Please choose a year")
		}
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		if  (lang==1)  {
			alert("Sleutel asb 'n geldige datum in met "/"")
		}else{
			alert("Please choose a valid date with "/"")
		}
		return false
	}
return true
}
// -----------------------------------------------------------------------------------------
// Check that a string contains only numbers
function isNumeric(string, ignoreWhiteSpace) {
   if (string.search) {
	  if ((ignoreWhiteSpace && string.search(/[^\d\s]/) != -1) || (!ignoreWhiteSpace && string.search(/\D/) != -1)) {
			return false
	  }		
   }
   return true
}
// -----------------------------------------------------------------------------------------
// Check for valid decimal value
function isDecimal(sText) {
   var ValidChars = "0123456789.";
   var isNumber=true;
   var Char;
 
   for (i = 0; i < sText.length && isNumber == true; i++) { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) {
         isNumber = false;
      }
   }
   return isNumber; 
}
// -----------------------------------------------------------------------------------------
// Validate e-mail address
function echeck(str) {
	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
		return false
	}
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		return false
	 }
	 if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		return false
	 }
	 if (str.indexOf(at,(lat+1))!=-1){
		return false
	 }
	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		 return false
	 }
	 if (str.indexOf(dot,(lat+2))==-1){
		return false
	 }
	 if (str.indexOf(" ")!=-1){
		 return false
	 }
	 return true                                                        
}
// -----------------------------------------------------------------------------------------
// Check that a string contains only letters and numbers
function isAlphanumeric(string, ignoreWhiteSpace) {
   if (string.search) {
      if ((ignoreWhiteSpace && string.search(/[^\w\s]/) != -1) || (!ignoreWhiteSpace && string.search(/\W/) != -1)) {
		    alert("User name may only contain A-Z, a-z en 0-9 character without any spaces")
		 	return false
	 }	  					
   }
   return true
}
// -----------------------------------------------------------------------------------------
// Check that password is alhpanumeric
function isAlphanum_Passw(string, ignoreWhiteSpace) {
   if (string.search) {
      if ((ignoreWhiteSpace && string.search(/[^\w\s]/) != -1) || (!ignoreWhiteSpace && string.search(/\W/) != -1)) {
		    alert("Password may only contain A-Z, a-z en 0-9 character without any spaces")
		 	return false
	 }	  					
   }
   return true
}
// -----------------------------------------------------------------------------------------
function Trim(TRIM_VALUE){
	if(TRIM_VALUE.length < 1){
		return"";
	}
	TRIM_VALUE = RTrim(TRIM_VALUE);
	TRIM_VALUE = LTrim(TRIM_VALUE);
	if(TRIM_VALUE==""){
		return "";
	}else{
		return TRIM_VALUE;
	}
}
// -----------------------------------------------------------------------------------------
function RTrim(VALUE){
	var w_space = String.fromCharCode(32);
	var v_length = VALUE.length;
	var strTemp = "";
	if(v_length < 0){
		return"";
	}
	var iTemp = v_length -1;

	while(iTemp > -1){
		if(VALUE.charAt(iTemp) == w_space){
		}else{
			strTemp = VALUE.substring(0,iTemp +1);
			break;
		}
		iTemp = iTemp-1;
	}
	return strTemp;
} 
// -----------------------------------------------------------------------------------------
function LTrim(VALUE){
	var w_space = String.fromCharCode(32);
	if(v_length < 1){
		return"";
	}
	var v_length = VALUE.length;
	var strTemp = "";
	var iTemp = 0;

	while(iTemp < v_length){
		if(VALUE.charAt(iTemp) == w_space){
		}else{
			strTemp = VALUE.substring(iTemp,v_length);
			break;
		}
		iTemp = iTemp + 1;
	}
	return strTemp;
} 
// -----------------------------------------------------------------------------------------