// Author: 			Paul Chivers
// Created:			June 30, 2000
// Last modified:	July 10, 2000

var defaultEmptyOK = false;
var whitespace = " \t\n\r\f\v ";
var digits = "0123456789";
var decimalPointDelimiter = "."
var provinceCodeDelimiter = "|";
var provinceCodes = "AB|BC|MB|NB|NF|NT|NS|ON|PE|QC|SK|YT";
var lowercaseLetters = "abcdefghijklmnopqrstuvwxyz";
var uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
var monthCodeDelimiter = "|";
var monthCodes = "jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec";

var NormalColor = "white";
var ErrorColor = "yellow";
var DisabledColor = "#D4D0C8";

var cOK				= 1;
var cInvalidDelimiter 	= 0;
var cInvalidMonth 		= 0;
var cInvalidDay		= 0;
var cInvalidYear		= 0;
var cNull				= 0;

function isEmpty(s){
	var i;
	var c;
	
	s += "";

    if ((s == null) || (s.length == 0)) {
		return true;
	} else {
	    for (i = 0; i < s.length; i++) {   
    	    c = s.charAt(i);
        	if (whitespace.indexOf(c) == -1) {
				return false;
			}
    	}
	}

    return true;
}

function isDigit (c){
	return ((c >= "0") && (c <= "9"))
}

function isLetter (c) {
	c += "";
	return ( ((c >= "a") && (c <= "z")) || ((c >= "A") && (c <= "Z")) )
}

function isInteger (s, eok) {
	var c;
	
	s += "";
	if (isEmpty(s)) {
		if (isInteger.arguments.length == 1) {
	   		return defaultEmptyOK;
		}
		else {
			return (eok == true);
		}
	}
	else {
        var startPos = 0;

        if ( s.length > 1 && ((s.charAt(0) == "-") || (s.charAt(0) == "+")) ) {
			s = s.substring(1, s.length);
		}
		
		for (i = 0; i < s.length; i++) {
    	    c = s.charAt(i);
        	if (!isDigit(c)) {
				return false;
			}
		}

		return true;
    }
}

function isNumeric (s, eok) {
	var c;

	s += "";
	
	if (isEmpty(s)) {
		if (isNumeric.arguments.length == 1) {
			return defaultEmptyOK;
		} else {
			return (eok == true);
		}
	} else {
        var startPos = 0;
		var seenDecimalPoint = false;

        if ( (s.charAt(0) == "-") || (s.charAt(0) == "+") ) {
			s = s.substring(1, s.length);
		}
		
		if (s == decimalPointDelimiter) {
			return false;
		}

	    for (i = 0; i < s.length; i++) {   
			c = s.charAt(i);
	
	        if ((c == decimalPointDelimiter) && !seenDecimalPoint) {
				seenDecimalPoint = true;
			}
	        else if (!isDigit(c)) {
				return false;
			}
	    }
	
	    return true;
	
	}
}

function isNumberInRange (s, a, b, EQok, eok) {
	var num;

	if (isEmpty(s)) {
		if (isNumberInRange.arguments.length < 5) {
			return defaultEmptyOK;
		}
		else {
			return (eok == true);
		}
	}
	else {
		num = parseFloat (s);
	    if (!isNumeric(num, false) || !isNumeric(a, false) || !isNumeric(b, false)) {
			return false;
		}
		else {    
			if (EQok == false) {
				return ((s > a) && (s < b));
			}
			else {
	    		return ((s >= a) && (s <= b));
			}
		}
	}
}

function isEmail (s, eok) 
{
	if (isEmpty(s)) 
	{
		if (isEmail.arguments.length == 1) 
		{
	   		return defaultEmptyOK;
		}
		else 
		{
			return (eok == true);
		}
   	}
	else 
	{
		s = trim(s);
        var i = 1;
    	var sLength = s.length;
    	
	    while ((i < sLength) && (s.charAt(i) != " ")) 
	    {
			i++
	    }
    	
    	if (i < sLength)
    	{
    	    return false;
    	}
    	else
    	{
    	 i = 1;
    	}
    	
	    while ((i < sLength) && (s.charAt(i) != "@")) 
	    {
			i++
	    }

    	if ((i >= sLength) || (s.charAt(i) != "@")) 
    	{
			return false;
		}
	    else 
	    {
			i += 2;
		}

	    while ((i < sLength) && (s.charAt(i) != ".")) 
	    {
			i++
	    }

    	if ((i >= sLength - 1) || (s.charAt(i) != ".")) 
    	{
			return false;
		}
	    else 
	    {
			return true;
		}
	}
}

function isProvinceCode (s, eok) {
	if (isEmpty(s)) {
		if (isProvinceCode.arguments.length == 1) {
	   		return defaultEmptyOK;
		}
       	else {
			return (eok == true);
		}
	}
	else {
		s = trim(s);
	
    	return (provinceCodes.indexOf(s) != -1 && s.indexOf(provinceCodeDelimiter) == -1);
	}
}

function isPostalCode (s, eok) {

	var i;
	
	if (isEmpty(s)) {
		if (isPostalCode.arguments.length == 1) {
			return defaultEmptyOK;
		}
       	else {
			return (eok == true);
		}
	}
	else {
		//s = trim(s);
		if (s.length == 6) {
			for (i = 0; i < s.length - 1; i++) {
				if (i % 2 == 0) {
					if (!isLetter(s.charAt(i))) {
						return false;
					}
				}
				else {
					if (!isDigit(s.charAt(i))) {
						return false;
					}			
				}
			}
		}
		else if (s.length == 7) {
			if (s.charAt(3) != " ") {
				return false;
			}
			else {
				for (i = 0; i < s.length - 1; i++) {
					if (i != 3) {
						if (i == 0 || i== 2 || i == 5) {
							if (!isLetter(s.charAt(i))) {
								return false;
							}
						}
						else {
							if (!isDigit(s.charAt(i))) {
								return false;
							}			
						}
					}
				}
			}
		}
		else {
			return false;
		}
		
		return true;
	}
}

function isDate (s, eok) {
	var dateDelimiter;
	var dateStyle;

	if (isEmpty(s)) {
		if (isDate.arguments.length == 1) {
			return cNull;
		}
		else {
			if (eok == true) {
				return cOK;
			}
			else {
				return cNull;
			}
		}
	}
	else {
		s = trim(s);
		
		if (isLetter(s.charAt(0)) && isLetter(s.charAt(1)) && isLetter(s.charAt(2))) {
	
			dateFormat = "alpha";
			if (s.charAt(3) == "/" && s.charAt(6) == "/") {
				dateDelimiter = "/";
			}
			else if (s.charAt(3) == "-" && s.charAt(6) == "-") {
				dateDelimiter = "-";
			}
			else if (isLetter(s.charAt(3))) {
				return cInvalidMonth;
			}
			else {
				return cInvalidDelimiter;
			}
	
		}
		else if	(isDigit(s.charAt(0)) && isDigit(s.charAt(1))) {
	
			dateFormat = "numeric";
			if (s.charAt(2) == "/" && s.charAt(5) == "/") {
				dateDelimiter = "/";
				dateStyle = "American";
			}
			else if (s.charAt(2) == "-" && s.charAt(5) == "-") {
				dateDelimiter = "-";
				dateStyle = "American";
			}
			else if (s.charAt(4) == "-" && s.charAt(7) == "-") {
				dateDelimiter = "-";
				dateStyle = "ISO";
			} else {
				return cInvalidDelimiter;
			}
		}
		else {
			return cInvalidMonth;
		}
		
		if (dateStyle == "American") {
			month = s.substring(0, s.indexOf(dateDelimiter)); 
			day = s.substring(s.indexOf(dateDelimiter) + 1, s.lastIndexOf(dateDelimiter));
			year =  s.substring(s.lastIndexOf(dateDelimiter) + 1, s.length); 
		} else if (dateStyle == "ISO") {
			year = s.substring(0, s.indexOf(dateDelimiter)); 
			month = s.substring(s.indexOf(dateDelimiter) + 1, s.lastIndexOf(dateDelimiter));
			day =  s.substring(s.lastIndexOf(dateDelimiter) + 1, s.length); 
		}
		
		if (year < 1900) {
			return cInvalidYear;
		}
	
		if (dateFormat == "numeric") {
		  	if (month > 12 || month < 1) {
				return cInvalidMonth;
			}
		}
		else if (dateFormat == "alpha") {
			if (monthCodes.indexOf(month.toLowerCase()) == -1 && month.indexOf(monthCodeDelimiter) == -1) {
				return cInvalidMonth;
			}
		}
	
		// handle leap years and February dates
		if (day >= 29 && month == 2) {
			if (year % 4 != 0) {
				return cInvalidDay;
			} else {
				if (day > 29 ) {
					return cInvalidDay;
				}
			}
		} else if (day == 31) {
			if (month == 4 || month == 6 || month == 9 || month == 11) {
				return cInvalidDay;
			}
		} else if (day > 31) {
			return cInvalidDay;
		}
	
		return cOK;
	}
}

function isDate2 (s, eok) {
	var dateDelimiter;

	if (isEmpty(s)) {
		if (isDate2.arguments.length == 1)
			return cNull;
		else {
			if (eok == true)
				return cOK;
			else
				return cNull;
		}
	} else {
		s = trim(s);
		dateArray = s.split('-');
		
		if( dateArray.length != 3 )
			return cInvalidDelimiter;

		if( !isInteger(dateArray[0], false) )
			return cInvalidDay;
			
		if( !isInteger(dateArray[2], false) )
			return cInvalidYear;
			
		day = dateArray[0];
	  	month = dateArray[1].toLowerCase();
		year =  dateArray[2];
	
		if (year < 1900)
			return cInvalidYear;
	
		if (monthCodes.indexOf(month.toLowerCase()) == -1)
			return cInvalidMonth;
	
		if (day == 29 && year % 4 != 0 && month == 'feb') {
			return cInvalidDay;
		} else if (day == 30 && month == 'feb') {
			return cInvalidDay;
		} else if (day == 31) {
			if (month == 'feb' || month == 'apr' || month == 'jun' || month == 'sep' || month == 'nov') {
				return cInvalidDay;
			}
		} else if (day > 31) {
			return cInvalidDay;
		}
				
		return cOK;
	}
}

function isPhoneNumber (s, eok) {
	var i;
	
	s = trim(s);
	
	if (isEmpty(s)) {
		if (isPhoneNumber.arguments.length == 1) {
	   		return defaultEmptyOK;
		}
    	else {
			return (eok == true);
		}
	}
	else if( s.length == 10 && isInteger(s, false)) {
			return true;
		}
	else {
	
		if (s.length > 14) {
			return false;
		}
		else if (s.length == 14) {
			if (s.charAt(0) == "(" && s.charAt(4) == ")" && s.charAt(5) == " " && s.charAt(9) == "-") {
				for (i = 1; i < s.length; i++) {
					if (!isDigit(s.charAt(i))) {
						if (i != 4 && i != 5 && i != 9) {
							return false;
						}		
					}
				}
			}
			else {
				return false;
			}
		}
		else if (s.length == 13) {
			if (s.charAt(0) == "(" && s.charAt(4) == ")" && s.charAt(8) == "-") {
				for (i = 1; i < s.length; i++) {
					if (!isDigit(s.charAt(i))) {
						if (i != 4 && i != 8) {
							return false;
						}		
					}
				}
			}
			else {
				return false;
			}
		}
		else if (s.length == 12) {
			if (s.charAt(3) == "-" && s.charAt(7) == "-") {
				for (i = 1; i < s.length; i++) {
					if (!isDigit(s.charAt(i))) {
						if (i != 3 && i != 7) {
							return false;
						}		
					}
				}
			}
			else {
				return false;
			}
		}
		else if (s.length == 10) {
			for (i = 0; i < s.length; i++) {
				if (!isDigit(s.charAt(i))) {
					return false;
				}		
			}
		}
		else {
			return false;
		}
		
		return true;
	}
}

function isPhoneNumber7digitPossibleExtension (s, eok) {
	var i;
	var dashFlag;

	dashFlag = false;
	
	s = trim(s);
	
	if (isEmpty(s)) {
		if (isPhoneNumber.arguments.length == 1) {
	   		return defaultEmptyOK;
		}
    		else {
			return (eok == true);
		}
	}
	else {
	
		if (s.length > 8) {
			
			if (s.charAt(3) == "-"){
			  dashFlag = true;
			}


			if (dashFlag == true){

				for (i = 0; i < 8; i++) {
					if (!isDigit(s.charAt(i))) {
						if (i != 3) {
							return false;
						}		
					}
				}


			}else{
				for (i = 0; i < 7; i++) {
					if (!isDigit(s.charAt(i))) {
						return false;
					}		
				}

			}


			for (i = 1; i < s.length; i++) {
				if (s.charAt(i) == 'x') {
					return true;
				}
			}

			return false;
		}
		else if (s.length == 8) {
			if (s.charAt(3) == "-") {
				for (i = 1; i < s.length; i++) {
					if (!isDigit(s.charAt(i))) {
						if (i != 3) {
							return false;
						}		
					}
				}
			}
			else {
				return false;
			}
		}
		else if (s.length == 7) {
			for (i = 0; i < s.length; i++) {
				if (!isDigit(s.charAt(i))) {
					return false;
				}		
			}
		}
		else {
			return false;
		}
		
		return true;
	}
}


function trim (s) {
	var i = 0;
	var emptyString = " ";
	
	while ((i < s.length) && (whitespace.indexOf(s.charAt(i)) != -1)) {
   		i++;
	}
	s = s.substring (i, s.length);
	
	i = s.length - 1;

	while ((i >= 0) && (whitespace.indexOf(s.charAt(i)) != -1)) {
		i--;
	}
	s = s.substring (0, i + 1);   
	
    return s;
}

function CheckRequiredField(Input, InputName) {
	return CheckField (Input, InputName, "Required", false);
}	

function CheckRequiredDateField(Input, InputName) {
	return CheckField (Input, InputName, "Date", false);
}

function CheckOptionalDateField(Input, InputName) {
	return CheckField (Input, InputName, "Date", true);
}

function CheckRequiredIntegerField(Input, InputName) {
	return CheckField (Input, InputName, "Integer", false);
}

function CheckOptionalIntegerField(Input, InputName) {
	return CheckField (Input, InputName, "Integer", true);
}

function CheckRequiredNumericField(Input, InputName) {
	return CheckField (Input, InputName, "Numeric", false);
}

function CheckOptionalNumericField(Input, InputName) {
	return CheckField (Input, InputName, "Numeric", true);
}

function CheckRequiredAlphaField(Input, InputName) {
	return CheckField (Input, InputName, "Alpha", false);
}

function CheckField (Input, InputName, CheckType, IsEmptyOK) {
	var IsValid;
	var MsgAddition;	

	if (CheckType == "Required") {
		IsValid = !isEmpty(Input.value);
	} else if (CheckType == "Date") {
		IsValid = isDate(Input.value, IsEmptyOK);
	} else if (CheckType == "Integer") {
		IsValid = isInteger(Input.value, IsEmptyOK);
	} else if (CheckType == "Alpha") {
		IsValid = isAlpha(Input.value, IsEmptyOK);
	} else if (CheckType == "Numeric") {
		IsValid = isNumeric(Input.value, IsEmptyOK);
	} else {
		IsValid = !isEmpty(Input.value);
	}

	if(!IsValid){
		MsgAddition = "\n\t-" + InputName;
		SetErrorColor(Input);
	} else {
		MsgAddition = "";
		ResetColor(Input);
	}

	return MsgAddition;
}

function SetDisabledColor (input) {
	input.style.backgroundColor=DisabledColor;
}
	
function SetErrorColor (input) {
	input.style.backgroundColor=ErrorColor;
}

function ResetColor (input) {
	if (input.disabled) {
		input.style.backgroundColor=DisabledColor;
	} else {
		input.style.backgroundColor=NormalColor;
	}
}

function RemoveHourPortion(RawDate) {
	RawDate.setHours(0);
	RawDate.setMinutes(0);
	RawDate.setSeconds(0);
	RawDate.setMilliseconds(0);
	
	return RawDate;
}

function IsWeekend(RawDate) {
	if ((RawDate.getDay() == 0) || (RawDate.getDay() == 6)) {
		return true;
	} else {
		return false;
	}
}

function GetPrintableDate(RawDate) {
	return (GetShortMonthName(RawDate) + " " + RawDate.getDate() + ", " + RawDate.getYear());
}

function GetShortMonthName(RawDate) {
	var MonthName;
	var MonthNumber = RawDate.getMonth();
	
	if (MonthNumber == 0) {
		MonthName = "Jan";
	} else if (MonthNumber == 1) {
		MonthName = "Feb";
	} else if (MonthNumber == 2) {
		MonthName = "Mar";
	} else if (MonthNumber == 3) {
		MonthName = "Apr";
	} else if (MonthNumber == 4) {
		MonthName = "May";
	} else if (MonthNumber == 5) {
		MonthName = "Jun";
	} else if (MonthNumber == 6) {
		MonthName = "Jul";
	} else if (MonthNumber == 7) {
		MonthName = "Aug";
	} else if (MonthNumber == 8) {
		MonthName = "Sep";
	} else if (MonthNumber == 9) {
		MonthName = "Oct";
	} else if (MonthNumber == 10) {
		MonthName = "Nov";
	} else if (MonthNumber == 11) {
		MonthName = "Dec";
	}

	return MonthName;	
}