<div id="alert"></div>
<form id="exm" method="POST" action="#">
    <div>
        <label>Required, Email :</label>
        <input type="text" name="name" data-validetta="required,minLength[2],maxLength[3]">
    </div>
    <div>
        <label>Email :</label>
        <input type="text" name="email" data-validetta="required,email">
    </div>
    <button type="submit">Submit</button>
    <button type="reset">Reset</button>
</form>

(function($){
    $('#exm').validetta({
        onValid : function( event ) {
            event.preventDefault();
            $('#alert').empty()
                .append('<div class="alert alert-success">Nice, Form is valid</div>');
        },
        onError : function( event ){
            $('#alert').empty()
                .append('<div class="alert alert-danger">Stop bro !! There are some errors.</div>');
        }
    });  
});