function form_validate(form)
{
	   if  (!_CF_checkdate(form.birthdate.value)){
		alert("Error\n\rPlease enter a valid date yyyy-mm-dd\n\r for example 1998-1-20");
	        return false; 
    	    }
        return true; 

}
		function _CF_checkdate(object_value)
    {
    //Returns true if value is a date format or is NULL
    //otherwise returns false   
    if (object_value.length == 0)
        return true;

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

        if (isplit == -1 || isplit == object_value.length)
                return false;
	sYear =object_value.substring(0,isplit);
	
        isplit = object_value.indexOf('-', isplit + 1);

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

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

        sDay = object_value.substring(isplit + 1);

        if (!_CF_checkinteger(sMonth)) //check month
                return false;
        else
        if (!checkrange(sMonth,1,12)) //check month
                return false;
        else
        if (!_CF_checkinteger(sYear)) //check year
                return false;
        else
        if (!checkrange(sYear, 1754, 9999)) //check year
                return false;
        else
        if (!_CF_checkinteger(sDay)) //check day
                return false;
        else
        if (!_CF_checkday(sYear, sMonth, sDay)) // check day
                return false;
        else
                return true;
    }

function checkrange(object_value, min_value, max_value)
    {
    //if value is in range then return true else return false
    if (!_CF_checknumber(object_value))
        {
        return false;
        }
    else
        {
        return (_CF_numberrange((eval(object_value*1)), min_value, max_value));
        }
        
    //All tests passed, so...
    return true;
    }

function _CF_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 _CF_checkrange(checkDay, 1, maxDay); //check day
    }



function _CF_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 _CF_checknumber(object_value);
    else
        return false;
    }



function _CF_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 _CF_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 _CF_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 (!_CF_checknumber(object_value))
        {
        return false;
        }
    else
        {
        return (_CF_numberrange((eval(object_value)), min_value, max_value));
        }
        
    //All tests passed, so...
    return true;
    }

	function s1_change(form){
	form.Location_Name.selectedIndex = form.Location_Code.selectedIndex;
	form.Location_Add.selectedIndex = form.Location_Code.selectedIndex;
	}
	function s2_change(form){
	form.Location_Code.selectedIndex = form.Location_Name.selectedIndex;
	form.Location_Add.selectedIndex = form.Location_Name.selectedIndex;
	}
	function s3_change(form){
	form.Location_Name.selectedIndex = form.Location_Add.selectedIndex;
	form.Location_Code.selectedIndex = form.Location_Add.selectedIndex;
	}


	function checkmonth(Object_Value){
	
	if (Object_Value.toUpperCase() == 'JAN')
		return true;
	else if (Object_Value.toUpperCase() == 'FEB')
		return true;
	else if(Object_Value.toUpperCase() == 'MAR')
		return true;
	else if(Object_Value.toUpperCase() == 'APR')
		return true;
	else if(Object_Value.toUpperCase() == 'MAY')
		return true;
	else if(Object_Value.toUpperCase() == 'JUN')
		return true;
	else if(Object_Value.toUpperCase() == 'JUL')
		return true;
	else if(Object_Value.toUpperCase() == 'AUG')
		return true;
	else if(Object_Value.toUpperCase() == 'SEP')
		return true;
	else if(Object_Value.toUpperCase() == 'OCT')
		return true;
	else if(Object_Value.toUpperCase() == 'NOV')
		return true;
	else if(Object_Value.toUpperCase() == 'DEC')
		return true;
	else 
		return false;
	}