$("#my_input").alphanum();

.alphanum();

.alpha();

.numeric();

$("#username").alphanum();

$("#username").alphanum({
	allowSpace: false, // Allow the space character
	allowUpper: false  // Allow Upper Case characters
});

var DEFAULT_SETTINGS_ALPHANUM = {
	allow              : '',    // Allow extra characters
	disallow           : '',    // Disallow extra characters
	allowSpace         : true,  // Allow the space character
	allowNumeric       : true,  // Allow digits 0-9
	allowUpper         : true,  // Allow upper case characters
	allowLower         : true,  // Allow lower case characters
	allowCaseless      : true,  // Allow characters that don't have both upper & lower variants - eg Arabic or Chinese
	allowLatin         : true,  // a-z A-Z
	allowOtherCharSets : true,  // eg é, Á, Arabic, Chinese etc
	forceUpper         : false, // Convert lower case characters to upper case
	forceLower         : false, // Convert upper case characters to lower case
	maxLength          : NaN    // eg Max Length
}

$("#username").alphanum("upper");

$("#username").alphanum({
	allowNumeric  : false,
	allowUpper    : true,
	allowLower    : false,
	allowCaseless : true
});

var CONVENIENCE_SETTINGS_ALPHANUM = {
	"alpha"      : {
		allowNumeric : false
	},
	"upper"      : {
		allowNumeric  : false,
		allowUpper    : true,
		allowLower    : false,
		allowCaseless : true
	},
	"lower"      : {
		allowNumeric  : false,
		allowUpper    : false,
		allowLower    : true,
		allowCaseless : true
	}
};

$("#weight").numeric();

$("#weight").numeric({
	allowMinus   : false,
	allowThouSep : false
});

var DEFAULT_SETTINGS_NUM = {
	allowPlus           : false, // Allow the + sign
	allowMinus          : true,  // Allow the - sign
	allowThouSep        : true,  // Allow the thousands separator, default is the comma eg 12,000
	allowDecSep         : true,  // Allow the decimal separator, default is the fullstop eg 3.141
	allowLeadingSpaces  : false,
	maxDigits           : NaN,   // The max number of digits
	maxDecimalPlaces    : NaN,   // The max number of decimal places
	maxPreDecimalPlaces : NaN,   // The max number digits before the decimal point
	max                 : NaN,   // The max numeric value allowed
	min                 : NaN    // The min numeric value allowed
}

$("#age").numeric("integer");

Equivalent to
$("#age").alphanum({
	allowPlus:    false,
	allowMinus:   true,
	allowThouSep: false,
	allowDecSep:  false
});

var CONVENIENCE_SETTINGS_NUMERIC = {
	"integer"         : {
		allowPlus:    false,
		allowMinus:   true,
		allowThouSep: false,
		allowDecSep:  false
	},
	"positiveInteger" : {
		allowPlus:    false,
		allowMinus:   false,
		allowThouSep: false,
		allowDecSep:  false
	}
};

$("#first_name").alpha();

$("#first_name").alphanum("alpha");

var blacklist = '!@#$%^&*()+=[]\\\';,/{}|":<>?~`.- _';

var blacklist = 
	  "\xAC"     // ¬
	+ "\u20AC"   // €
	+ "\xA3"     // £
	+ "\xA6"     // ¦
	;

$("#password").alphanumeric({
	allow :    '&,;', // Specify characters to allow
	disallow : 'xyz'  // Specify characters to disallow
});

$.fn.alphanum.setNumericSeparators({
	thousandsSeparator: " ",
	decimalSeparator: ","
});