In the code shown below, how to get the values of multiselect box in function val() using jQuery or pure JavaScript?

<script>

    function val() {

        //Get values of mutliselect drop down box

    }



    $(document).ready(function () {

        var flag = 0;

        $('#emp').change(function () {

            var sub = $(OPTION:selected, this).val()

            if (flag == 1) $('#new_row').remove();

            $('#topics').val('');

            var html = '<tr id=new_row class=new_row><td>Topics:</td><td>  <select    id=topic_l name=topic_l class=topic_l multiple=multiple>';

            var idarr = new Array();

            var valarr = new Array(); { %

                for top in dict.tops %

            }

            idarr.push('{{top.is}}');

            valarr.push('{{pic.ele}}'); { % endfor %

            }

            for (var i = 0; i < idarr.length; i++) {

                if (sub == idarr[i]) {

                    html += '<option value=' + idarr[i] + ' >' + valarr[i] + '</option>';

                }

            }

            html += '</select></p></td></tr>';

            $('#tops').append(html);

            flag = 1;

        });

    });

</script>

Emp:&nbsp;&nbsp;&nbsp;&nbsp;

<select id=emp name=emp>

    <option value=></option>

    <option value=1>1</option>

</select>



<div name=tops id=tops></div>



<input type=submit value=Create Template id=create onclick=javascript:var ret=val();return ret;>