$.getJSON("removerequest.htm",{ ids: selectedString }, function(data){
                $('#removerequestdiv').text('');

                var output = [];
                output.push('<select id="addedList" multiple="multiple" size="10">');
                for (var index in data) {
                    output.push('<option value="' + data[index].id + '">' + data[index].voornaam + data[index].familienaam + '</option>');
                }
                alert(output);
                output.push('</select>');
                $('#removerequestdiv').html(output.join(' '));
            });