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 MonthAsInteger(month) {
	
	if ('Jan' == month) return 1;
	if ('Feb' == month) return 2;
	if ('Mar' == month) return 3;
	if ('Apr' == month) return 4;
	if ('May' == month) return 5;
	if ('Jun' == month) return 6;
	if ('Jul' == month) return 7;
	if ('Aug' == month) return 8;
	if ('Sep' == month) return 9;
	if ('Oct' == month) return 10;
	if ('Nov' == month) return 11;
	if ('Dec' == month) return 12;

	return month;
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1 + 1)
	var strMonth=dtStr.substring(pos1 + 1,pos2)
	var strDay=dtStr.substring(pos2 + 1)
	var strYear=dtStr.substring(0, pos1)
	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){
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		return false
	}
        return true
}


function check_holiday (dt_date) {

        // check simple dates (month/date - no leading zeroes)
        var n_date = dt_date.getDate(),
        n_month = dt_date.getMonth() + 1;
        var s_date1 = n_month + '/' + n_date;

        if ( s_date1 == '1/1' // New Year's Day
        || s_date1 == '6/14' // Flag Day
        || s_date1 == '7/4' // Independence Day
        || s_date1 == '11/11' // Veterans Day
        || s_date1 == '12/25' // Christmas Day
        ) return true;

        // weekday from beginning of the month (month/num/day)
        var n_wday = dt_date.getDay(),
        n_wnum = Math.floor((n_date - 1) / 7) + 1;
        var s_date2 = n_month + '/' + n_wnum + '/' + n_wday;

        if ( s_date2 == '1/3/1' // Birthday of Martin Luther King, third Monday in January
        || s_date2 == '2/3/1' // Washington's Birthday, third Monday in February
        || s_date2 == '5/3/6' // Armed Forces Day, third Saturday in May
        || s_date2 == '9/1/1' // Labor Day, first Monday in September
        || s_date2 == '10/2/1' // Columbus Day, second Monday in October
        || s_date2 == '11/4/4' // Thanksgiving Day, fourth Thursday in November
        ) return true;

        // weekday number from end of the month (month/num/day)
        var dt_temp = new Date (dt_date);
        dt_temp.setDate(1);
        dt_temp.setMonth(dt_temp.getMonth() + 1);
        dt_temp.setDate(dt_temp.getDate() - 1);
        n_wnum = Math.floor((dt_temp.getDate() - n_date - 1) / 7) + 1;
        var s_date3 = n_month + '/' + n_wnum + '/' + n_wday;

        if ( s_date3 == '5/1/1' // Memorial Day, last Monday in May
        ) return true;

        // misc complex dates
        if (s_date1 == '1/20' && (((dt_date.getFullYear() - 1937) % 4) == 0)
        // Inauguration Day, January 20th every four years, starting in 1937.
        ) return true;

        if (n_month == 11 && n_date >= 2 && n_date < 9 && n_wday == 2
        // Election Day, Tuesday on or after November 2.
        ) return true;

return false;
}

function validateDate( value ){
	if ( isDate( value ) == false )
	{
		return false;
	}
    return true;
}