var keybYN = new keybEdit('yn','Valid values are \'Y\' or \'N\'.');
var keybNumeric = new keybEdit('01234567890 ','Numeric input only.');
var keybNumericPlus = new keybEdit('01234567890,.: ','Numeric input only.');
var keybTime = new keybEdit('01234567890:ampmAPPM ','Time input only.');
var keybAlpha = new keybEdit('abcdefghijklmnopqurstuvwxyz ','Alpha input only.');
var keybAlphaPlus = new keybEdit('abcdefghijklmnopqurstuvwxyz01234567890£.;:@#~|!,?+-_ ','Alpha input only.');
var keybAlphaNumeric = new keybEdit('abcdefghijklmnopqurstuvwxyz01234567890 ','Alpha-numeric input only.');
var keybTaxDistrict = new keybEdit('abcdefghijklmnopqurstuvwxyz01234567890/ ','Alpha-numeric and / input only.');
var keybDecimal = new keybEdit('01234567890.','Decimal input only.');
var keybCurrency = new keybEdit('01234567890.','Currency input only.');
var keybDate =  new keybEdit('01234567890/','Date input only');;
var keybYNNM = new keybEdit('yn');
var keybNumericNM = new keybEdit('01234567890');
var keybAlphaNM = new keybEdit('abcdefghijklmnopqurstuvwxy');
var keybAlphaNumericNM = new keybEdit('abcdefghijklmnopqurstuvwxy01234567890');
var keybDecimalNM = new keybEdit('01234567890.');
var keybDateNM = new keybEdit('01234567890/');;


function keybEdit(strValid, strMsg) {
/*
Function: keybEdit
Creation Date: October 11, 2001
Programmer: Edmond Woychowsky
Purpose: The purpose of this function is to be a constructor for
the keybEdit object. keybEdit objects are used by the
function editKeyBoard to determine which keystrokes are
valid for form objects. In addition, if an error occurs,
they provide the error message.

Please note that the strValid is converted to both
upper and lower case by this constructor. Also, that
the error message is prefixed with 'Error:'.

The properties for this object are the following:
valid = Valid input characters
message = Error message

The methods for this object are the following:
getValid() = Returns a string containing valid characters.
getMessage() = Returns a string containing the error message.

Update Date: Programmer: Description:
*/

// Variables
var reWork = new RegExp('[a-z]','gi'); // Regular expression\

// Properties
if(reWork.test(strValid))
this.valid = strValid.toLowerCase() + strValid.toUpperCase();
else
this.valid = strValid;

if((strMsg == null) || (typeof(strMsg) == 'undefined'))
this.message = '';
else
this.message = strMsg;

// Methods
this.getValid = keybEditGetValid;
this.getMessage = keybEditGetMessage;

function keybEditGetValid() {
/* Function: keybEdit
Creation Date: October 11, 2001
Programmer: Edmond Woychowsky
Purpose: The purpose of this function act as the getValid method
for the keybEdit object. Please note that most of the
following logic is for handling numeric keypad input.

Update Date: Programmer: Description:
*/

return this.valid.toString();
}

function keybEditGetMessage() {
/* Function: keybEdit
Creation Date: October 11, 2001
Programmer: Edmond Woychowsky
Purpose: The purpose of this function act as the getMessage method
for the keybEdit object.

Update Date: Programmer: Description:
*/

return this.message;
}
}

function editKeyBoard(evt, objKeyb) {
/* Function: editKeyBoard
Creation Date: October 11, 2001
Programmer: Edmond Woychowsky
Purpose: The purpose of this function is to edit edit keyboard input
to determine if the keystrokes are valid.

Update Date: Programmer: Description:
February 26, 2002 Edmond Woychowsky Added logic to handle control key
sequences.
May 10, 2002 Edmond Woychowsky Modified logic for message-less
errors.
June 5, 2002 Edmond Woychowsky Modified logic to prevent dollar signs
in numeric fields.
June 11, 2003 Edmond Woychowsky Modified logic to accomadate backspace.
April 11, 2007 Edmond Woychowsky Updated for cross-browser DOM support,
also remove keypad logic.
*/

var strWork = objKeyb.getValid();
var strMsg = ''; // Error message
var blnValidChar = false; // Valid character flag
//var intCode = evt.charCode == undefined ? evt.keyCode : evt.charCode;
var intCode = (evt.charCode) ? evt.charCode : evt.keyCode;
// Part 1: Validate input
if(!blnValidChar)

switch(true) {
case(intCode == 8):
case(intCode == 9):
case(intCode == 10):
case(intCode == 13):
case(intCode == 37):
//case(intCode == 39):
blnValidChar = true;

break;
default:
for(i=0;i < strWork.length;i++) 
if(intCode == strWork.charCodeAt(i)) {
blnValidChar = true;

break;
} 

break;
}

// Part 2: Build error message
if(!blnValidChar) {
if(objKeyb.getMessage().toString().length != 0)
//alert('Error: ' + objKeyb.getMessage());

evt.stopPropagation = true;

try {
evt.preventDefault();
}
catch(e) { 
window.event.returnValue = false; // Clear invalid character
}
}
}