function verifyYear(dDate)
{

   var iYear = dDate.getFullYear();

   if (iYear < 1990)
   {	
	dDate.setFullYear(iYear + 100)
   }

   return dDate;
}


function parseDate(object_value)
{
    //Returns true if value is a date format or is NULL
    //otherwise returns false	

    if (object_value.length == 0)
        return "";

    //Returns true if value is a date in the mm/dd/yyyy format
	isplit = object_value.indexOf('/');

	if (isplit == -1 || isplit == object_value.length)
		return "";

    sMonth = object_value.substring(0, isplit);

	if (sMonth.length == 0)
        return "";

	isplit = object_value.indexOf('/', isplit + 1);

	if (isplit == -1 || (isplit + 1 ) == object_value.length)
		return "";

    sDay = object_value.substring((sMonth.length + 1), isplit);

	if (sDay.length == 0)
        return "";

	sYear = object_value.substring(isplit + 1);


	if (!checkInteger(sMonth)) //check month
		return "";
	else
	if (!checkRange(sMonth, 1, 12)) //check month
		return "";
	else
	if (!checkInteger(sYear)) //check year
		return "";
	else
	if (!checkRange(sYear, 0, 9999)) //check year
		return "";
	else
	if (!checkInteger(sDay)) //check day
		return "";
	else
	if (!checkDay(sYear, sMonth, sDay)) // check day
		return "";

	return verifyYear(new Date(sYear,sMonth-1,sDay,0,0,0,0));
}

function checkRange(object_value, min_value, max_value)
    {
    //if value is in range then return true else return false

    if (object_value.length == 0)
        return true;


    if (!checkNumber(object_value))
	{
	return false;
	}
    else
	{
	return (numberRange((eval(object_value)), min_value, max_value));
	}
	
    //All tests passed, so...
    return true;
    }

function checkDay(checkYear, checkMonth, checkDay)
{

	maxDay = 31;

	if (checkMonth == 4 || checkMonth == 6 ||
			checkMonth == 9 || checkMonth == 11)
		maxDay = 30;
	else
	if (checkMonth == 2)
	{
		if (checkYear % 4 > 0)
			maxDay =28;
		else
		if (checkYear % 100 == 0 && checkYear % 400 > 0)
			maxDay = 28;
		else
			maxDay = 29;
	}

	return checkRange(checkDay, 1, maxDay); //check day
}



function checkInteger(object_value)
{
    //Returns true if value is a number or is NULL
    //otherwise returns false	

    if (object_value.length == 0)
        return true;

    //Returns true if value is an integer defined as
    //   having an optional leading + or -.
    //   otherwise containing only the characters 0-9.
	var decimal_format = ".";
	var check_char;

    //The first character can be + -  blank or a digit.
	check_char = object_value.indexOf(decimal_format)
    //Was it a decimal?
    if (check_char < 1)
	return checkNumber(object_value);
    else
	return false;
}



function numberRange(object_value, min_value, max_value)
{
    // check minimum
    if (min_value != null)
	{
        if (object_value < min_value)
		return false;
	}

    // check maximum
    if (max_value != null)
	{
	if (object_value > max_value)
		return false;
	}
	
    //All tests passed, so...
    return true;
}



function checkNumber(object_value)
    {
    //Returns true if value is a number or is NULL
    //otherwise returns false	

    if (object_value.length == 0)
        return true;

    //Returns true if value is a number defined as
    //   having an optional leading + or -.
    //   having at most 1 decimal point.
    //   otherwise containing only the characters 0-9.
	var start_format = " .+-0123456789";
	var number_format = " .0123456789";
	var check_char;
	var decimal = false;
	var trailing_blank = false;
	var digits = false;

    //The first character can be + - .  blank or a digit.
	check_char = start_format.indexOf(object_value.charAt(0))
    //Was it a decimal?
	if (check_char == 1)
	    decimal = true;
	else if (check_char < 1)
		return false;
        
	//Remaining characters can be only . or a digit, but only one decimal.
	for (var i = 1; i < object_value.length; i++)
	{
		check_char = number_format.indexOf(object_value.charAt(i))
		if (check_char < 0)
			return false;
		else if (check_char == 1)
		{
			if (decimal)		// Second decimal.
				return false;
			else
				decimal = true;
		}
		else if (check_char == 0)
		{
			if (decimal || digits)	
				trailing_blank = true;
        // ignore leading blanks

		}
	        else if (trailing_blank)
			return false;
		else
			digits = true;
	}	
    //All tests passed, so...
    return true
    }

function getSelOption(varCtrlArrayName)
{

	
	for(var i=0;i<document.getElementsByName(varCtrlArrayName).length;i++)
	{
		if(document.getElementsByName(varCtrlArrayName)[i].checked) 
			return i;
	}

	return -1;

}

function checkvalue(obj,type)
{
if (type == "TEXT")
   {
    if (obj.value.length == 0 || obj.value.replace(/^\s*|\s*$/,'').length == 0) 
    	return false;
    else 
    	return true;
    } else
	return true;
}

function CheckValidEmail(value) {
  if (value == "") 
  {
    return (true);
  } 
  else
  {
  	if (value == "" || value.indexOf ('@', 1) == -1 || value.indexOf ('.', 3) == -1) 
  	{
    	return (false);
  	} 
  	else
  	{
    	return (true);
  	}
  } 
}

function IsNumeric(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;
   
}
function IsFloat(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;
   
}

function CheckDateRange(FromCtrl, ToCtrl)
{
	var dtmFrom = parseDate(document.getElementById(FromCtrl).value);
	var dtmTo = parseDate(document.getElementById(ToCtrl).value);

	if (dtmFrom.length == 0)
	{
		alert ("please specify From Date");
		return false;
	}

	if (dtmTo.length == 0)
	{
		alert ("please specify To Date");
		return false;
	}

	if (dtmFrom > dtmTo)
	{
            alert ('From Date should be less that To Date');
            return false;
	}
	
	return true;
}

function check_IsNumeric(obj, errMsg, fRequired)
{	
	if (checkvalue(obj,"TEXT") && !IsNumeric(obj.value))
	{
		alert ('Invalid Number. Integer value is expected.');
		obj.focus();
		return false;
	}

	if (!checkvalue(obj,"TEXT") && fRequired)
	{
		alert (errMsg);
		obj.focus();
		return false;
	}
	
	return true;
}

function check_IsFloat(obj, errMsg, fRequired)
{	
	if (checkvalue(obj,"TEXT") && !IsFloat(obj.value))
	{
		alert ('Invalid Number.');
		obj.focus();
		return false;
	}

	if (!checkvalue(obj,"TEXT") && fRequired)
	{
		alert (errMsg);
		obj.focus();
		return false;
	}
	
	return true;
}



function check_IsDate(obj, errMsg, fRequired)
{	
	if (parseDate(obj.value).length == 0 && checkvalue(obj,"TEXT"))
	{
		alert ('Invalid Date Value. Please enter date in format [mm/dd/yyyy].');
		obj.focus();
		return false;
	}

	if (fRequired && !checkvalue(obj,"TEXT"))
	{
		alert (errMsg);
		obj.focus();
		return false;
	}
	
	return true;
}