Validar alfanumerico

[Aguante Kanario]

// ---------------------------------------------------------------------- //
// NUMEROS //
// ---------------------------------------------------------------------- //

// s es un numero entero (con o sin signo)
function isInteger (s)
{ var i;
if (isEmpty(s))
if (isInteger.arguments.length == 1) return defaultEmptyOK;
else return (isInteger.arguments[1] == true);

for (i = 0; i < s.length; i++)
{
var c = s.charAt(i);
if( i != 0 ) {
if (!isDigit(c)) return false;
} else {
if (!isDigit(c) && (c != "-") || (c == "+")) return false;
}
}
return true;
}

// s es un numero (entero o flotante, con o sin signo)
function isNumber (s)
{ var i;
var dotAppeared;
dotAppeared = false;
if (isEmpty(s))
if (isNumber.arguments.length == 1) return defaultEmptyOK;
else return (isNumber.arguments[1] == true);

for (i = 0; i < s.length; i++)
{
var c = s.charAt(i);
if( i != 0 ) {
if ( c == "." ) {
if( !dotAppeared )
dotAppeared = true;
else
return false;
} else
if (!isDigit(c)) return false;
} else {
if ( c == "." ) {
if( !dotAppeared )
dotAppeared = true;
else
return false;
} else
if (!isDigit(c) && (c != "-") || (c == "+")) return false;
}
}
return true;
}

// ---------------------------------------------------------------------- //
// STRINGS SIMPLES //
// ---------------------------------------------------------------------- //

// s tiene solo letras
function isAlphabetic (s)
{ var i;

if (isEmpty(s))
if (isAlphabetic.arguments.length == 1) return defaultEmptyOK;
else return (isAlphabetic.arguments[1] == true);
for (i = 0; i < s.length; i++)
{
// Check that current character is letter.
var c = s.charAt(i);

if (!isLetter(c))
return false;
}
return true;
}


// s tiene solo letras y numeros
function isAlphanumeric (s)
{ var i;

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

for (i = 0; i < s.length; i++)
{
var c = s.charAt(i);
if (! (isLetter(c) || isDigit(c) ) )
return false;
}

return true;
}

// s tiene solo letras, numeros o espacios en blanco
function isName (s)
{
if (isEmpty(s))
if (isName.arguments.length == 1) return defaultEmptyOK;
else return (isAlphanumeric.arguments[1] == true);

return( isAlphanumeric( stripCharsInBag( s, whitespace ) ) );
}

// ---------------------------------------------------------------------- //
// FONO o EMAIL //
// ---------------------------------------------------------------------- //

// s es numero de telefono valido
function isPhoneNumber (s)
{ var modString;
if (isEmpty(s))
if (isPhoneNumber.arguments.length == 1) return defaultEmptyOK;
else return (isPhoneNumber.arguments[1] == true);
modString = stripCharsInBag( s, phoneChars );
return (isInteger(modString))
}

// s es una direccion de correo valida
function isEmail (s)
{
if (isEmpty(s))
if (isEmail.arguments.length == 1) return defaultEmptyOK;
else return (isEmail.arguments[1] == true);
if (isWhitespace(s)) return false;
var i = 1;
var sLength = s.length;
while ((i < sLength) && (s.charAt(i) != "@"))
{ i++
}

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

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

if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
else return true;
}

// ---------------------------------------------------------------------- //
// FUNCIONES PARA RECLAMARLE AL USUARIO //
// ---------------------------------------------------------------------- //

// pone el string s en la barra de estado
function statBar (s)
{ window.status = s
}

// notificar que el campo theField esta vacio
function warnEmpty (theField)
{ theField.focus()
alert(mMessage)
statBar(mMessage)
return false
}

// notificar que el campo theField es invalido
function warnInvalid (theField, s)
{ theField.focus()
theField.select()
alert(s)
statBar(pPrompt + s)
return false
}

// el corazon de todo: checkField
function checkField (theField, theFunction, emptyOK, s)
{
var msg;
if (checkField.arguments.length < 3) emptyOK = defaultEmptyOK;
if (checkField.arguments.length == 4) {
msg = s;
} else {
if( theFunction == isAlphabetic ) msg = pAlphabetic;
if( theFunction == isAlphanumeric ) msg = pAlphanumeric;
if( theFunction == isInteger ) msg = pInteger;
if( theFunction == isNumber ) msg = pNumber;
if( theFunction == isEmail ) msg = pEmail;
if( theFunction == isPhoneNumber ) msg = pPhoneNumber;
if( theFunction == isName ) msg = pName;
}

if ((emptyOK == true) && (isEmpty(theField.value))) return true;

if ((emptyOK == false) && (isEmpty(theField.value)))
return warnEmpty(theField);

if (theFunction(theField.value) == true)
return true;
else
return warnInvalid(theField,msg);

}
</SCRIPT>