jQuery chosen plugin demo
by lemon kazi
HTML
<script src="https://cdnjs.cloudflare.com/ajax/libs/chosen/1.4.2/chosen.jquery.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/chosen/1.4.2/chosen.min.css">
<div>
<select data-placeholder="Choose a Country..." class="chosen-select" style="width:350px;" tabindex="4" id="skills_chosen">
<option value=""></option>
</select>
</div>
JavaScript
$('.chosen-select').chosen({});
$(".chosen-container").bind('keyup',function(e) {
var items="";
items+="<option value='aaaa'>aaaa</option>";
$("#skills_chosen").append(items);
$('#skills_chosen').trigger("chosen:updated");
console.log('sss');
//if(e.which === 13) {
// $('#myform').submit();
// or your stuff here...
// }
});