// FormChek.js
// 18 Feb 97 created Eric Krock
// (c) 1997 Netscape Communications Corporation

var whitespace = "\r\n 	";

var mPrefix = "You did not enter a value into the "
var mSuffix = " field. This is a required field. Please enter it now."

// s is an abbreviation for "string"

var sEmail = "Email"

// i is an abbreviation for "invalid"

var iEmail = "This field must be a valid email address (like me@here.com). Please reenter it now."


// p is an abbreviation for "prompt"

var pEmail = "valid email address (like foo@bar.com)."

var defaultEmptyOK = false

// checkString (TEXTFIELD theField, STRING s, [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is not all whitespace.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkString (theField, s, emptyOK)
{   // Next line is needed on NN3 to avoid "undefined is not a number" error
    // in equality comparison below.
    if (checkString.arguments.length == 2) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    if (isWhitespace(theField.value))
       return warnEmpty (theField, s);
    else return true;
}

// Notify user that required field theField is empty.
// String s describes expected contents of theField.value.
// Put focus in theField and return false.

function warnEmpty (theField, s)
{   theField.focus()
    alert(mPrefix + s + mSuffix)
    return false
}

// isEmail (STRING s [, BOOLEAN emptyOK])
//
// Email address must be of form a@b.c -- in other words:
// * there must be at least one character before the @
// * there must be at least one character before and after the .
// * the characters @ and . are both required
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

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

    // is s whitespace?
    if (isWhitespace(s)) return false;

    // there must be >= 1 character before @, so we
    // start looking at character position 1
    // (i.e. second character)
    var i = 1;
    var sLength = s.length;

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

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

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

    // there must be at least one character after the .
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}



// Check whether string s is empty.

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

// Returns true if string s is empty or
// whitespace characters only.

function isWhitespace (s)


{   var i;

    // Is s empty?
    if (isEmpty(s)) return true;

    // 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 false;
    }

    // All characters are whitespace.
    return true;
}

// checkEmail (TEXTFIELD theField [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is a valid Email.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkEmail (theField, emptyOK)
{   if (checkEmail.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else if (!isEmail(theField.value, false))
       return warnInvalid (theField, iEmail);
    else return true;
}

// Notify user that contents of field theField are invalid.
// String s describes expected contents of theField.value.
// Put select theField, pu focus in it, and return false.

function warnInvalid (theField, s)
{   theField.focus()
    theField.select()
    alert(s)
    return false
}

 function checkInt(str)
 {
	var isInt = true;
 	var l = str.length;
 	var i = 0;
 	for(i=0; i<l; i++)
 	{
 		ch = str.charAt(i);
 		if ( !(ch >= '0' && ch <= '9') )
 		{
			isInt = false;
			break;
 		}
 	}
 	return isInt;
 }

function checkDate(m,d,y)
{
	if(((y % 100 != 0 && y % 4 == 0) || ( y % 400 == 0 ) ) && m == 2 && d >29)
	{
		return false;
	}
	else if((y % 4) != 0 && m == 2 && d >28)
	{
		return false;
	}
	else if( (m == 4 || m == 6 || m == 9 || m == 11) && d > 30)
	{
		return false;
	}
	else
	{
		return true;
	}
}
//added by jigar on 9/8/03
//this function will check source date must be less then target date.
function IsDateGreater(src_m,src_d,src_y ,tar_m,tar_d,tar_y){

	var date1, date2;

	date1 = parseInt(src_y + src_m + src_d);
	date2 = parseInt(tar_y + tar_m + tar_d);

	if (date1 > date2)
	{
		return true;
	}
	else
	{
		return false;
	}
/*	var srcDate = new Date(src_d,src_m,src_y);
	var tarDate = new Date(tar_d,tar_m,tar_y);	
	
	srcDate.setDate(src_d);
	srcDate.setMonth(src_m);
	srcDate.setYear(src_y);

	tarDate.setDate(tar_d);
	tarDate.setMonth(tar_m);
	tarDate.setYear(tar_y);
	
	
	if (srcDate > tarDate){
		return true;	
	}else{
		return false;	
	}//end of if
*/	

}//ended by jigar on 9/8/03