JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.10.0/jquery.validate.min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.10.0/additional-methods.js"></script>
<form id="myform">
    <select class="escolhaVidro id_material" name="id_material[3456545]" id="id_material">
        <option value="">please choose...</option>
        <option>option 1</option>
        <option>option 2</option>
        <option>option 3</option>
    </select>
    <br/>
    <select class="escolhaVidro id_material" name="id_material[98899]" id="id_material2">
        <option value="">please choose...</option>
        <option>option 1</option>
        <option>option 2</option>
        <option>option 3</option>
    </select>
    <br/>
    <input type="submit" />
</form>
<a href="http://docs.jquery.com/Plugins/Validation" target="_blank">Validation Documentation</a>

CSS

a {
    display: block;
    position: absolute;
    bottom: 0;
}

JavaScript

$(document).ready(function () {

    $('#myform').validate({
        submitHandler: function (form) { // for demo
            alert('valid form'); // for demo
            return false; // for demo
        }
    });

    // must be called after validate()
    $('select.id_material').each(function () {
        $(this).rules('add', {
            required: true
        });
    });

});