请你在我的代码中的帮助，我想在J Query移动的中使用过滤器进行选择，我尝试了下面的代码，它成功地过滤了数据，但在选择一个选项时，它不返回任何东西，并返回此错误

Cannot read property 'jqmData' of undefined

这是我在java脚本中使用的代码

<form>
    <div class="ui-field-contain">
        <label for="select-custom-20">Long list:</label>
        <select name="select-custom-20" id="select-custom-20" data-native-menu="false" class="filterable-select">
            <option value="AL">Alabama</option>
            <option value="AK">Alaska</option>
            <option value="AZ">Arizona</option>
            <option value="AR">Arkansas</option>
            <option value="CA">California</option>

        </select>
    </div>
</form>

这是Java脚本

( function( $ ) {
function pageIsSelectmenuDialog( page ) {
    var isDialog = false,
        id = page && page.attr( "id" );
    $( ".filterable-select" ).each( function() {
        if ( $( this ).attr( "id" ) + "-dialog" === id ) {
            isDialog = true;
            return false;
        }
    });
    return isDialog;
}
$.mobile.document

    .on( "selectmenucreate", ".filterable-select", function( event ) {
        var input,
            selectmenu = $( event.target ),
            list = $( "#" + selectmenu.attr( "id" ) + "-menu" ),
            form = list.jqmData( "filter-form" );

        if ( !form ) {
            input = $( "<input data-type='search'></input>" );
            form = $( "<form></form>" ).append( input );
            input.textinput();
            list
                .before( form )
                .jqmData( "filter-form", form ) ;
            form.jqmData( "listview", list );
        }

        selectmenu
            .filterable({
                input: input,
                children: "> option[value]"
            })

            .on( "filterablefilter", function() {
                selectmenu.selectmenu( "refresh" );
            });
    })

    .on( "pagecontainerbeforeshow", function( event, data ) {
        var listview, form;

        if ( !pageIsSelectmenuDialog( data.toPage ) ) {
            return;
        }
        listview = data.toPage.find( "ul" );
        form = listview.jqmData( "filter-form" );
        data.toPage.jqmData( "listview", listview );
        listview.before( form );
    })

    .on( "pagecontainerhide", function( event, data ) {
        var listview, form;
        if ( !pageIsSelectmenuDialog( data.toPage ) ) {
            return;
        }
        listview = data.prevPage.jqmData( "listview" ),
        form = listview.jqmData( "filter-form" );
        listview.before( form );
    });
})( jQuery );