/***************************************************************************************/
// General functions
/***************************************************************************************/

/////////////////////////////////////////////////////////////////////////////////////////
// Populates number of days based on the month selected [both combo boxes]
/////////////////////////////////////////////////////////////////////////////////////////
function setMonthDays(formName, monthCombo, dateCombo, yearCombo) {
	yearCombo = eval("document." + formName + "." + yearCombo);
	monthCombo = eval("document." + formName + "." + monthCombo);
	dateCombo = eval("document." + formName + "." + dateCombo);
	totalDays = 0;
	
	mmVal = monthCombo.options[monthCombo.selectedIndex].value;
	yyVal = yearCombo.options[yearCombo.selectedIndex].value;
	
	if(mmVal == 2) {
		if(yyVal % 4 == 0) {
			totalDays = 29;
		}
		else {
			totalDays = 28;
		}
	}
	else {
		if(mmVal == 4 || mmVal == 6 || mmVal == 9 || mmVal == 11) {
			totalDays = 30;
		}
		else {
			totalDays = 31;
		}
	}
	
	if(totalDays > 0) {
		dateCombo.length = totalDays;
		for(dateCount = 1; dateCount <= totalDays; dateCount ++) {
			itemCount = dateCount - 1;
			dateCombo.options[itemCount].value = dateCount;
			dateCombo.options[itemCount].text = dateCount;
		}
		dateCombo.options[0].selected = true;
	}
	return;
}

/////////////////////////////////////////////////////////////////////////////////////////
// Checks whether a date entered is a valid date or not.
/////////////////////////////////////////////////////////////////////////////////////////
function checkDate(ddVal, mmVal, yyVal) {
	if(ddVal <= 0 || ddVal > 31 || mmVal <= 0 || mmVal > 12 || yyVal <= 0 || yyVal.length != 4) {
		alert("Please enter a valid date");
		return false;
	}
	monthArray = new Array("January", "Febuary", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
	if(mmVal == 2) {
		if(yyVal % 4 == 0) {
			if(ddVal > 29) {
				alert("February " + yyVal + " has only 29 days");
				return false;
			}
		}
		else {
			if(ddVal > 28) {
				alert("February " + yyVal + " has only 28 days");
				return false;
			}
		}
	}
	else {
		if(mmVal == 4 || mmVal == 6 || mmVal == 9 || mmVal == 11) {
			if(ddVal > 30) {
				alert(monthArray[mmVal-1] + " has only 30 days");
				return false;
			}
		}
	}
	return true;
}

/////////////////////////////////////////////////////////////////////////////////////////
// Checks whether a string is a valid email address.
/////////////////////////////////////////////////////////////////////////////////////////
function checkEmail(emailString) {
	splitVal = emailString.split('@');
	
	if(splitVal.length <= 1) {
		alert("Please enter a valid Email Address");
		return false;
	}
	if(splitVal[0].length <= 0 || splitVal[1].length <= 0) {
		alert("Please enter a valid email address");
		return false;
	}
	
	splitDomain = splitVal[1].split('.');
	if(splitDomain.length <= 1) {
		alert("Please enter a valid email address");
		return false;
	}
	if(splitDomain[0].length <= 0 || splitDomain[1].length <= 1) {
		alert("Please enter a valid email address");
		return false;
	}
	return true;
}

/////////////////////////////////////////////////////////////////////////////////////////
// Removes the leading and trailing spaces in a strings and returns the trimmed string
/////////////////////////////////////////////////////////////////////////////////////////
function trimSpaces(stringValue) {
	// Checks the first occurance of spaces and removes them
	for(i = 0; i < stringValue.length; i++) {
		if(stringValue.charAt(i) != " ") {
			break;
		}
	}
	if(i > 0) {
		stringValue = stringValue.substring(i);
	}
	
	// Checks the last occurance of spaces and removes them
	strLength = stringValue.length - 1;
	for(i = strLength; i >= 0; i--) {
		if(stringValue.charAt(i) != " ") {
			break;
		}
	}
	if(i < strLength) {
		stringValue = stringValue.substring(0, i + 1);
	}
	
	// Returns the string after removing leading and trailing spaces.
	return stringValue;
}

/////////////////////////////////////////////////////////////////////////////////////////
// Check whether a string contain permitted characters only
/////////////////////////////////////////////////////////////////////////////////////////
function checkAllowedChars(strToCheck, allowedChars)
{
     var acLen     = allowedChars.length;
     var stcLen     = strToCheck.length;
     strToCheck     = strToCheck.toLowerCase();
     var i;
     var j;
     var rightCount = 0;
     for(i = 0; i < acLen; i++)
     {
          switch(allowedChars.charAt(i))
          {
          case 'A':
               for(j = 0; j< stcLen; j++)
               {
                    rightCount += strToCheck.charAt(j) >= 'a' && strToCheck.charAt(j) <= 'z';
               }
               break;
          case 'N':
               for(j = 0; j< stcLen; j++)
               {
                    rightCount += strToCheck.charAt(j) >= '0' && strToCheck.charAt(j) <= '9';
               }
               break;
          default:
               for(j = -1; -1 != (j = strToCheck.indexOf(allowedChars.charAt(i), j + 1)); rightCount++);
               break;
          }
     }
     if(rightCount == stcLen)
     {
          return true;
     }
     return false;
}

/////////////////////////////////////////////////////////////////////////////////////////
// Checks whether the first date argument is less than the second date argument
// Date arguments should be in the format - dd/mm/yyyy
/////////////////////////////////////////////////////////////////////////////////////////
function checkDateDifference(lowDate, highDate, comparison) {
	lowDateSplit = lowDate.split('/');
	highDateSplit = highDate.split('/');

	date1 = new Date();
	date2 = new Date();

	date1.setDate(lowDateSplit[0]);
	date1.setMonth(lowDateSplit[1] - 1);
	date1.setYear(lowDateSplit[2]);

	date2.setDate(highDateSplit[0]);
	date2.setMonth(highDateSplit[1] - 1);
	date2.setYear(highDateSplit[2]);

	if(comparison == "eq") {
		if(date1.getTime() == date2.getTime()) {
			return true;
		}
		else {
			return false;
		}
	}
	else if(comparison == "lt") {
		if(date1.getTime() < date2.getTime()) {
			return true;
		}
		else {
			return false;
		}
	}
	else if(comparison == "gt") {
		if(date1.getTime() > date2.getTime()) {
			return true;
		}
		else {
			return false;
		}
	}
	else if(comparison == "le") {
		if(date1.getTime() <= date2.getTime()) {
			return true;
		}
		else {
			return false;
		}
	}
	else if(comparison == "ge") {
		if(date1.getTime() >= date2.getTime()) {
			return true;
		}
		else {
			return false;
		}
	}
}

function formatCheck(dateStr) {
	dateSplit = dateStr.split("/");
	if(dateSplit.length != 3) {
		return false;
	}
	if(trimSpaces(dateSplit[0]).length <= 0 || trimSpaces(dateSplit[1]).length <= 0 || trimSpaces(dateSplit[2]).length <= 0) {
		return false;
	}
	return true;
}
function closeWindow() {
	parent.window.opener.window.focus();
	parent.window.close();
}

/*********** Newly Added *******************/ 

   	function checkValidDate(dateStr) {
	    var slash1 = dateStr.indexOf("/");
	    /*if (slash1 == -1)
	    {
		slash1 = dateStr.indexOf("-");
	    }*/
	    // if no slashes or dashes, invalid date
	    if (slash1 == -1)
	    {
		return false;
	    }
	    var dateDay = dateStr.substring(0, slash1)
	    var dateMonthAndYear = dateStr.substring(slash1+1, dateStr.length);
	    var slash2 = dateMonthAndYear.indexOf("/");
	    if (slash2 == -1)
	    {
		slash2 = dateMonthAndYear.indexOf("-");
	    }
	    // if not a second slash or dash, invalid date

	   if (slash2 == -1)
	   {
		return false;
	   }
	    var dateMonth = dateMonthAndYear.substring(0, slash2);
	    var dateYear = dateMonthAndYear.substring(slash2+1, dateMonthAndYear.length);
	    if ( (dateMonth == "") || (dateDay == "") || (dateYear == "") )
	    {
		return false;
	    }
	    // if any non-digits in the month, invalid date
	    for (var x=0; x < dateMonth.length; x++) {
		var digit = dateMonth.substring(x, x+1);
		if ((digit < "0") || (digit > "9"))
		{
			return false;
		}
	    }

	    // convert the text month to a number
	    var numMonth = 0;
	    for (var x=0; x < dateMonth.length; x++) {
		digit = dateMonth.substring(x, x+1);
		numMonth *= 10;
		numMonth += parseInt(digit);
	    }

	    if ((numMonth <= 0) || (numMonth > 12))
	    {
		return false;
	    }
	    // if any non-digits in the day, invalid date
	    for (var x=0; x < dateDay.length; x++) {
		digit = dateDay.substring(x, x+1);
		if ((digit < "0") || (digit > "9")) { return false; }
	    }
	    // convert the text day to a number
	    var numDay = 0;
	    for (var x=0; x < dateDay.length; x++){
		digit = dateDay.substring(x, x+1);
		numDay *= 10;
		numDay += parseInt(digit);
	    }

	    if ((numDay <= 0) || (numDay > 31))
	    {
		return false;
	    }

	    // February can't be greater than 29 (leap year calculation comes later)
	    if ((numMonth == 2) && (numDay > 29))
	    {	 return false;
	    }
	    // check for months with only 30 days
	    if ((numMonth == 4) || (numMonth == 6) || (numMonth == 9) || (numMonth == 11))
	    {
		if (numDay > 30)
		{
			return false;
		}

	   }
	    // if any non-digits in the year, invalid date
	    for (var x=0; x < dateYear.length; x++) {
		digit = dateYear.substring(x, x+1);
		if ((digit < "0") || (digit > "9")) { return false; }
	    }
	    // convert the text year to a number
	    var numYear = 0;
	    for (var x=0; x < dateYear.length; x++) {
		digit = dateYear.substring(x, x+1);
		numYear *= 10;
		numYear += parseInt(digit);
	    }
	    // Year must be a 2-digit year or a 4-digit year
	    if ( (dateYear.length != 2) && (dateYear.length != 4) ) { return false; }
	    // if 2-digit year, use 50 as a pivot date
	    if ( (numYear < 50) && (dateYear.length == 2) ) { numYear += 2000; }
	    if ( (numYear < 100) && (dateYear.length == 2) ) { numYear += 1900; }
	    if ((numYear <= 0) || (numYear > 9999)) { return false; }
	    // check for leap year if the month and day is Feb 29
	    if ((numMonth == 2) && (numDay == 29)) {
		var div4 = numYear % 4;
		var div100 = numYear % 100;
		var div400 = numYear % 400;
		// if not divisible by 4, then not a leap year so Feb 29 is invalid
		if (div4 != 0) { return false; }
		// at this point, year is divisible by 4. So if year is divisible by
		// 100 and not 400, then it's not a leap year so Feb 29 is invalid
		if ((div100 == 0) && (div400 != 0)) { return false; }
	    }
	    // date is valid
	    return true;
	}
	
	/*  ******* Date validation end *********/