<!--
	// This file contains the data validation JavaScript functions
	// It is included in the HTML pages with forms that need these
	// data validation routines.


// DEFINE VARIABLES

// whitespace characters
var whitespace = " \t\n\r";

/****************************************************************/

function replaceAll (s, fromStr, toStr)
{
	var new_s = s;
	for (i = 0; i < 100 && new_s.indexOf (fromStr) != -1; i++)
	{
		new_s = new_s.replace (fromStr, toStr);
	}
	return new_s;
}


/****************************************************************/

// 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;
}

/****************************************************************/

// 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;
}

/****************************************************************/

// Checks to see if a required field is blank.  If it is, a warning
// message is displayed...

function ForceEntry(objField)
{
	var strField = new String(objField.value);
	if (isWhitespace(strField))
	{
		alert("All fields are mandatory. If not applicable put 0.");
		objField.focus();
		objField.select();
		return false;
	}

	return true;
}

function ForceEntry(objField, FieldName)
{
	var strField = new String(objField.value);
	if (isWhitespace(strField))
	{
		alert("Provide information for : " + FieldName);
		objField.focus();
		objField.select();
		return false;
	}

	return true;
}

/************************************/
function ForceSelection(objField, FieldName)
{
	if (objField.value == "")
	{
		alert("You need to select : " + FieldName);
		objField.focus();
		return false;
	}

	return true;
}
		
/****************************************************************/

// Returns true if the string passed in is a valid number
//  (no alpha characters), else it displays an error message

function ForceNumber(objField, FieldName)
{
	var strField = new String(objField.value);
	
	if (isWhitespace(strField)) return true;

	var i = 0;

	for (i = 0; i < strField.length; i++)
	{
		if ((strField.charAt(i) < '0' || strField.charAt(i) > '9') && (strField.charAt(i) != '.'))
		{
			alert(FieldName + " Must be a valid numeric entry");
			objField.focus();
			return false;
		}
    }
	return true;
}

/****************************************************************/

// Returns true if the string passed in is a valid money
//  (no alpha characters except a decimal place), 
//   else it displays an error message

function ForceMoney(objField, FieldName)
{
	var strField = new String(objField.value);
	
	if (isWhitespace(strField)) return true;

	var i = 0;

	for (i = 0; i < strField.length; i++)
	{
		if ((strField.charAt(i) < '0' || strField.charAt(i) > '9') && (strField.charAt(i) != '.'))
		{
			alert(FieldName + " must be a valid numeric entry.  Please do not use commas or dollar signs or any non-numeric symbols.");
			objField.focus();
			return false;
		}
    }
	return true;
}/****************************************************************/

function ForceLength(objField, nLength, strWarning)
{
	var strField = new String(objField.value);

	if (strField.length > nLength)
	{
		alert(strWarning);
		objField.focus();
		return false;
	}
	else
	{
		return true;
	}
}

/*******************/

function validateUsername(objField, fieldName)
{
    if(ForceEntry(objField, fieldName) == false) return false;

    var iChars = "!@#$%^&*()+=-[]\\\';,./{}|\":<>?";

    for (var i = 0; i < objField.value.length; i++)
    {
        if (iChars.indexOf(objField.value.charAt(i)) != -1)
        {
            alert ("Special characters are not allowed in username.\n Please remove them and try again.");
            objField.focus();
            objField.select();
            return false;
        }
    }
}

function ForceEmail(objField)
{
    var str = objField.value;
    
    var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
    
    if (filter.test(str))
    {
        return true;
    }
    else
    {
        alert("Invalid Email");
        objField.focus();
        return false;
    }
}
// -->