select multi sample

HTML

<select multiple>
  <option value="abc">abc</option>
  <option value="def">def</option>
  <option value="ghi">ghi</option>
</select>
<div id="console"></div>

JavaScript

$("select").change(function(event) {
  var selectedValue = event.originalEvent ? event.target.value : "123";
  var count = this.value;
  $("#console").text(count + ' ' + selectedValue);
});