/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// 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 isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=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("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}

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

function isFloat (s){
	var defaultEmptyOK = false;
	var decimalPointDelimiter = ".";
	var i;
    var seenDecimalPoint = false;

    if (isEmpty(s))
       if (isFloat.arguments.length == 1) return defaultEmptyOK;
       else return (isFloat.arguments[1] == true);

    if (s == decimalPointDelimiter) return false;

    // Search through string's characters one by one
    // until we find a non-numeric character.
    // When we do, return false; if we don't, return true.

    for (i = 0; i < s.length; i++)
    {
        // Check that current character is number.
        var c = s.charAt(i);

        if ((c == decimalPointDelimiter) && !seenDecimalPoint) seenDecimalPoint = true;
        else if (!isDigit(c)) return false;
    }

    // All characters are numbers.
    return true;
}

function isEmpty(s)
{
	return ((s == null) || (s.length == 0))
}

function isWhitespace(s){
	// whitespace characters
	var whitespace = " \t\n\r";
	var i;
    // Is s empty?
    if (isEmpty(s)) return false;
    // Search through string's characters one by one
    // until we find a non-whitespace character.
    // When we do, return false; if we don't, return true.
    for (i = 0; i < s.length; i++)
    {
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (whitespace.indexOf(c) == -1) return true;
    }
    // All characters are whitespace.
    return false;
}

function isPastDate(dateStr){
    
	delimeterFirstPos = dateStr.indexOf("/");
	delimeterLastPos = dateStr.lastIndexOf("/");

	// date inputted
	inputMonth = dateStr.substr(0,delimeterFirstPos);
	inputDay = dateStr.substr(Math.abs(delimeterFirstPos) + 1, ((Math.abs(delimeterLastPos)-Math.abs(delimeterFirstPos))-1) );
	inputYear = dateStr.substr(Math.abs(delimeterLastPos) + 1, 4);
	
	dateInput = new Date(inputYear, inputMonth - 1, inputDay); 	// full date
    
    //alert(inputMonth + ' ' + inputDay + ' ' + inputYear); 
	
	dateNow = new Date();
	monthNow = dateNow.getMonth();
	dayNow = dateNow.getDate();
	yearNow = dateNow.getFullYear();

	dateNow = new Date(yearNow, monthNow ,dayNow);
    
	if (dateInput > dateNow ){
		return false;
	}
	
	return true;
}

function isCurrentDate(dateStr)
{ 
	delimeterFirstPos = dateStr.indexOf("/");
	delimeterLastPos = dateStr.lastIndexOf("/");

	// date inputted
	inputMonth = dateStr.substr(0,delimeterFirstPos);
	inputDay = dateStr.substr(Math.abs(delimeterFirstPos) + 1, ((Math.abs(delimeterLastPos)-Math.abs(delimeterFirstPos))-1) );
	inputYear = dateStr.substr(Math.abs(delimeterLastPos) + 1, 4);
	theMonth = Math.abs(inputMonth) - 1;
	dateInput = new Date(Math.abs(inputYear), Math.abs(theMonth), Math.abs(inputDay)); 	// full date
    
	dateNow = new Date();
	monthNow = dateNow.getMonth();
	dayNow = dateNow.getDate();
	yearNow = dateNow.getFullYear();

	if (Math.abs(inputYear) == yearNow && Math.abs(theMonth) == monthNow && Math.abs(inputDay) == dayNow) {
	    return true;
	}
	/*
	dateNow = new Date(yearNow, monthNow ,dayNow);
    
	if (dateInput == dateNow ) {
	    alert(yes)
		return true;
	}
	*/
	return false;
    
}

function compareDate(sDate, eDate){
	// start date
	delimeterFirstPos = sDate.indexOf("/");
	delimeterLastPos = sDate.lastIndexOf("/");

	monthStart= sDate.substr(0,delimeterFirstPos);
	dayStart = sDate.substr(Math.abs(delimeterFirstPos) + 1, ((Math.abs(delimeterLastPos)-Math.abs(delimeterFirstPos))-1) );
	yearStart = sDate.substr(Math.abs(delimeterLastPos) + 1, 4);
	startDate = new Date(yearStart, monthStart - 1,dayStart); // full date

	// end date
	delimeterFirstPos = eDate.indexOf("/");
	delimeterLastPos = eDate.lastIndexOf("/");

	monthEnd = eDate.substr(0,delimeterFirstPos);
	dayEnd = eDate.substr(Math.abs(delimeterFirstPos) + 1, ((Math.abs(delimeterLastPos)-Math.abs(delimeterFirstPos))-1) );
	yearEnd = eDate.substr(Math.abs(delimeterLastPos) + 1, 4);
	endDate = new Date(yearEnd, monthEnd - 1,dayEnd); // full date

	
	
	if ( startDate > endDate ){
		return false;
	}

	return true;
}

function checkAll(theForm, theName, bool, trigger) 
{
    var bool = Boolean(bool)

    for (i = 0 ; i < theForm.elements.length ; i++) {
        if (theForm.elements[i].name == theName) {
            theForm.elements[i].checked = bool;
        }    	
    }
    
        
    trigger.checked = bool;
    
    /*
    if (bool == true) {
        theForm.btn_trigger.value = "Uncheck All";
        theForm.hdn_trigger.value = 'false';
	
    } 
    
    if (bool == false) {
    	theForm.btn_trigger.value = 'Check All';
    	theForm.hdn_trigger.value = 'true';
    }
    */		  	
}

function uncheckTrigger(theForm, theName, bool, trigger)
{
    var bool = Boolean(bool)
    var allChecked = true; 
    
    if (bool == false) {    
        trigger.checked = false;
    } else {
        for (i = 0 ; i < theForm.elements.length ; i++) {        
            if (theForm.elements[i].name == theName && theForm.elements[i].checked == false) {
                allChecked = false;        
            }
        }
        
        trigger.checked = allChecked; 
    }
}

function clearDate(field)
{
    if (field.value == 'mm/dd/yyyy') {
        field.value = '';
    }
}