<select class="select1" multiple> <option value="1">One</option> <option value="2">Two</option> <option value="3">Three</option> </select> <script> let dlb1 = new DualListbox('.select1'); </script>
<select class="select1" multiple> <option value="1">One</option> <option value="2">Two</option> <option value="3">Three</option> </select> <script> let dlb1 = new DualListbox('.select1'); </script>