java script error

im having various problems with my site i believe its something to do with this:

catInput.autocomplete({

                minLength: 0,

                source: categories,

                focus: function( event, ui ) {

                    catInput.val( ui.item.label.replace(/&/g, "&") );

                    return false;

                },

                select: function( event, ui ) {

                    catInput.val( ui.item.label.replace(/&/g, "&") );

                    catInputID.val( ui.item.value );

                    return false;

                }

            }).data( "autocomplete" )._renderItem = function( ul, item ) {

                return $( "<li>" )

                    .data( "item.autocomplete", item )

                    .append( "<a>" + item.label + "</a>" )

                    .appendTo( ul );

            };

But im not too sure on where to locate this.. someone please help as its stressing me out! :@

ANY help with this would be appreciated!
This is the full script that is causing the error:

<script>

        jQuery(document).ready(function($) {

            var categories = [

                { value: "23", label: "Arts & Crafts" },

                { value: "12", label: "Catering" },

                { value: "26", label: "Days Out" },

                { value: "27", label: "Food & Dining" },

                { value: "28", label: "Health & Beauty" },

                { value: "24", label: "Party Services\/Entertainers" },

                { value: "17", label: "Play Areas" },

                { value: "14", label: "Play Sessions" },

                { value: "25", label: "Services & Trade" },

                { value: "19", label: "Shopping" },

                { value: "11", label: "Sports" }

            ];

            var locations = [

                { value: "5", label: "Liverpool" },

                { value: "6", label: "St Helens" }

            ];

            var catInput = $( "#dir-searchinput-category" ),

                catInputID = $( "#dir-searchinput-category-id" ),

                locInput = $( "#dir-searchinput-location" ),

                locInputID = $( "#dir-searchinput-location-id" );

            catInput.autocomplete({

                minLength: 0,

                source: categories,

                focus: function( event, ui ) {

                    catInput.val( ui.item.label.replace(/&/g, "&") );

                    return false;

                },

                select: function( event, ui ) {

                    catInput.val( ui.item.label.replace(/&/g, "&") );

                    catInputID.val( ui.item.value );

                    return false;

                }

            }).data( "autocomplete" )._renderItem = function( ul, item ) {

                return $( "<li>" )

                    .data( "item.autocomplete", item )

                    .append( "<a>" + item.label + "</a>" )

                    .appendTo( ul );

            };

            var catList = catInput.autocomplete( "widget" );

            catList.niceScroll({ autohidemode: false });

            catInput.click(function(){

                catInput.val('');

                catInputID.val('0');

                catInput.autocomplete( "search", "" );

            });

            locInput.autocomplete({

                minLength: 0,

                source: locations,

                focus: function( event, ui ) {

                    locInput.val( ui.item.label.replace(/&/g, "&") );

                    return false;

                },

                select: function( event, ui ) {

                    locInput.val( ui.item.label.replace(/&/g, "&") );

                    locInputID.val( ui.item.value );

                    return false;

                },

                open: function(event, ui) {

                }

            }).data( "autocomplete" )._renderItem = function( ul, item ) {

                return $( "<li>" )

                    .data( "item.autocomplete", item )

                    .append( "<a>" + item.label + "</a>" )

                    .appendTo( ul );

            };

            var locList = locInput.autocomplete( "widget" );

            locList.niceScroll({ autohidemode: false });

            locInput.click(function(){

                locInput.val('');

                locInputID.val('0');

                locInput.autocomplete( "search", "" );

            });

        });

        </script>