Defining your own regex

Html:

<form method="post" id="form">
    <div class="row">
        <div class="col-md-12">
            <input type="text" id="labelSubject" class="form-control" data-field="subject">
            <label for="labelSubject">Only upper-case *</label>
            <div class="valid-message"></div>
        </div>
    </div>
    <div class="row">
        <div class="col-md-12">
            <button class="btn btn-primary" type="submit">CHECK</button>
        </div>
    </div>
</form>

JavaScript:

<script>
   var form = $('#form').formValid({
    fields: {
        "name": {
            "required": true, 
            "tests": [
                {
                    "regex": "^[A-Z]+$", 
                    "message": "Only upper-case letter"
                }
            ]
        }
    }
});

form.keypress(300);

$('button[type="submit"]').click(function() {
    form.test();
    if (form.errors() == 0) {
        alert('Ok');
    }
    return false;
});
</script>