<form id="test_form" type="POST">
    <p><input type="text" data-validate="required" name="name" id="name" /><span class="error_message"></span></p>
    <p><input type="text" data-validate="email" name="email" id="email" /><span class="error_message"></span></p>
    <p><input type="text" data-validate="url" name="url" id="url" /><span class="error_message"></span></p>
    <p><input type="text" data-validate="numeric" name="fav_num" id="fav_num" /><span class="error_message"></span></p>
    <p><input type="checkbox" data-validate="required" name="age-check" id="age-check" /><span class="error_message"></span></p>
    <p><button type="submit">Validate!</button></p>
</form>