(function( $ ) {

$.fn.validEmail = function(options) {

options = options || {};

var on = options.on;

var success = options.success || (function(){});

var failure = options.failure || (function(){});

var testInitially = options.testInitially || false;

var $input = $(this);

function check($input) {

if($input.is("input,textarea")) {

var emailRegExp = /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i;

return emailRegExp.test($input.val());

} else {

return false;

}

}

function applyCode($input) {

check($input) ? success.call($input.get(0)) : failure.call($input.get(0));

}

if (typeof on === "string")

$input.bind(on, function() { applyCode($(this)); });

if (testInitially) $input.each(function() { applyCode($(this)); });

return check($input);

};

})( jQuery );