jquery error

jquery error


is this a bug?
can you help me about this error?
thanks in advance!
######## code-snippet:
$(document).ready(function()
    {
        $("#Standard select, #Select select")
        .change(function(e){
            var productType = $(this.parentNode.parentNode).attr("id");
            var selects = $("#"+productType+" select");
            if(this.value == "" && selects.length > 1)
            {    //entferne select-feld inkl. umgebendem


                $(this.parentNode).remove();
            }
            else if(selects.length < 10 && selects[selects.length-1].value !=
"")
            {    //erzeuge neues select feld bei dem option mit value=""
ausgewaehlt ist
                var clone = $(this.parentNode).clone(true).insertAfter(selects
[selects.length-1].parentNode);
                $("#"+productType+" select:last").val("");
            }
            for(var i=0;i<selects.length;i++)
                selects[i].value
            var selectedPositions = [];
            $("#"+productType+" Select")
            .each(function(i){
                selectedPositions[this.selectedIndex] = this.selectedIndex;
            })
            .each(function(i){
                $(this.options).each(function(ii){
                    if(selectedPositions[ii] && !this.selected)
                        this.disabled = true;
                    else
                        this.disabled = false;
                });
            });
            return false;
        })
        .ready(function(){
            //wenn dom bereit, rufe change-funktion auf select elemente auf,
die keinen leeren wert haben (damit - keine Auswahl - feld erhalten
bleibt)
            $("#Standard select:not([value='']), #Select select:not
([value='']").trigger('change');
        })
        ;
    });
######## js-error:
Fehler: match[3] is undefined
Quelldatei: http://xxxxxxxxxx.de/js/jquery/jquery.js
Zeile: 1833
firebug:
match[3] is undefined
PSEUDO()()jquery.js (Linie 1833)
filter()()jquery.js (Linie 1594)
dirCheck()jquery.js (Linie 2318)
(?)()()jquery.js (Linie 1735)
Sizzle()()jquery.js (Linie 1492)
Sizzle()()jquery.js (Linie 1525)
find()()jquery.js (Linie 292)
init()()jquery.js (Linie 78)
(?)()()jquery.js (Linie 26)
(?)()()db_vita_...m_angebot (Linie 2497)
ready()()jquery.js (Linie 2964)
(?)()()db_vita_...m_angebot (Linie 2495)
(?)()()jquery.js (Linie 3032)
each()([function(), function(), function(), 1 more...], function(),
undefined)jquery.js (Linie 692)
ready()()jquery.js (Linie 3031)
(?)()()