Koha OPAC filtering

$("select[name='idx']").append("<option value='bc'>Accession No.</option>");

$( '<select name="limit" id="limitfiler" style="margin-left: 4px;"> \
<option value="">-- filter by item type --</option> \
<option value="mc-itype:BK">Book</option> \
<option value="mc-itype:SCST">SC/ST Books</option> \
<option value="mc-itype:REF">Reference Books</option> \
<option value="mc-itype:SER">Serials</option> \
</select>' ).insertAfter('#masthead_search');