自动完成不会'；我再也不工作了

有几天我和老师一起做了一个自动完成输入！

现在我试着再次测试它，但它突然不起作用了！

我的老师现在有一段时间不在了，所以我不得不一个人试试
但我就是不知道该怎么解决。（是的，我确实试过了。）
它确实给出了$_GET。（所以这不是问题所在）

JQuery:

var element = '';
function split( val ) {
 return val.split( /,'s*/ );
}
function extractLast( term ) {
 return split( term ).pop();
}
function getSearchlocation( ) {
 return $(element).data('searchlocation');
}
$( ".tag" ).bind( "keydown", function( event ) {
 if ( event.keyCode === $.ui.keyCode.TAB &&
     $( this ).autocomplete( "instance" ).menu.active ) {
     event.preventDefault();
 }
})
.autocomplete({
 source: function( request, response ) {
     $.getJSON( 'checklistHandler.php', {
         term: extractLast( request.term ),
         searchlocation: getSearchlocation(  )
     }, response );
 },
 search: function() {
     var term = extractLast( this.value );
     element = this;
     if ( term.length < 2 ) {
         return false;
     }
 },
 focus: function() {
     return false;
     },
 select: function( event, ui ) {
     var terms = split( this.value );
     terms.pop();
     terms.push( ui.item.value );
     terms.push( "" );
     this.value = terms.join( ", " );
     return false;
 }
});

经办人：

if ($_GET['term']) {
    if($_GET['searchlocation']=='cursus')
    {
        $table = 'flexibel';
        $column = 'app';
    }
    elseif($_GET['searchlocation']=='boek')
    {
        $table = 'boeken';
        $column = 'naam';
    }
    else
    {
        exit;
    }
$search = $_GET['term'];
$query = mysql_query("SELECT ".$column." FROM ".$table." WHERE ".$column." LIKE '%".$search."%'");
$result = array();
$i=0;
while($r = mysql_fetch_assoc($query))
{
    $result[] = array('id'=>$i, 'label'=>$r[$column], 'value'=>$r[$column]);
    $i++;
}
echo json_encode($result);

}

输入：

if ($onderdeel['formInputType'] == 'autocomplete')
{
    ?>
    <tr>
        <input type="hidden" name="buildingblock[<?=$onderdeel['formBuildingBlockId']?>][formBuildingBlockId]" value="<?=$onderdeel['formBuildingBlockId']?>">
        <td class="<?= $class ?>" width="320" style="vertical-align: middle;"><?= $onderdeel['formInputLabel'] ?><?=($onderdeel['formRequired'] == 'on' ? '<img title="Verplicht Veld" alt="Verplicht Veld" style="position: relative; top: -10px; height: 5px; width: 5px;" src="'.IMG.'/asterisk_orange.png">' : '')?></td>
        <td class="<?= $class ?>" width="320"><textarea style="min-width: 212px; max-width: 212px;" class="tag" data-searchlocation="<?=$onderdeel['formInputOptions']?>" name="buildingblock[<?=$onderdeel['formBuildingBlockId']?>][content]" <?=($onderdeel['formRequired'] == 'on' ? 'required' : '')?>><?=$onderdeel['formContent']?></textarea></td>
        <td class="<?= $class ?>" width="60" style="vertical-align: middle; text-align: center;"><input type="checkbox" name="buildingblock[<?=$onderdeel['formBuildingBlockId']?>][checked]" value="1"<?= ($onderdeel['formContentChecked'] == 1 ? ' checked="checked"' : '') ?> /></td>
        <td class="<?= $class ?>" width="60" style="vertical-align: middle; text-align: center;"><a href="checklistHandler.php?delete_vraag=<?=$test?>"></a></td>
    </tr>
<?
}

请求的响应为：
[{"id":0,"label":"Excel Basis","value":"Excel Basis"},{"id":1,"label":"Excel Essentials","value":"Excel Essentials"},{"id":2,"label":"Excel Gevorderd","value":"Excel Gevorderd"},{"id":3,"label":"Excel: Analyse en Rapportage","value":"Excel: Analyse en Rapportage"},{"id":4,"label":"Excel: Draaitabellen en Grafieken","value":"Excel: Draaitabellen en Grafieken"},{"id":5,"label":"Excel: Functies en Formules","value":"Excel: Functies en Formules"},{"id":6,"label":"Excel: Koppelingen en Macro'u2019s ","value":"Excel: Koppelingen en Macro'u2019s "},{"id":7,"label":"Flexibele cursussen","value":"Flexibele cursussen"},{"id":8,"label":"Word: Complexe Documenten","value":"Word: Complexe Documenten"}]

我希望你能帮我解决问题。

贪婪，

马蒂厄。