Jquery for AutoComplete in Apex Salesforce

<apex:page controller="AutoCompleteDemoController">
    <!--Make sure you have the Javascript in the same order that I have listed below.-->
    <script src="https://code.jquery.com/jquery-1.8.2.js"></script>
    <script src="/soap/ajax/26.0/connection.js" type="text/javascript"></script>
    <script src="https://code.jquery.com/ui/1.9.0/jquery-ui.js"></script>
    <link rel="stylesheet" href="https://code.jquery.com/ui/1.9.1/themes/base/jquery-ui.css"/>
    <script type="text/javascript">
        var j$ = jQuery.noConflict();
        var apexAccountList =[];
       
        //use the <!-- <apex:repeat > -->tag to iterate through the list returned from the class and store only the names in the javascript variable.
        <apex:repeat value="{!accountList}" var="accList">
            //Store the name of the account in the array variable.
            apexAccountList.push('{!accList.name}');
        </apex:repeat>
       
        //We will establish a connection salesforce database using the sforce.connection.init(sessionID, ServerURL) function.
        var sid = '{!$Api.Session_ID}';
        var server = "https://" + window.location.host + "/services/Soap/u/26.0";
        sforce.connection.init(sid, server);
       
        //We will query the contact object using the sforce.connection.query function. This will return 200 results.
        var result = sforce.connection.query("select Name from Contact");
        var records = result.getArray("records");
        var javascriptContactList =[];
       
        //Iterate thru the list of contact and store them in a javascript simple array variable which will then assign it to the source of the autocomplete.
        for(i=0;i<records.length;i++){
            javascriptContactList[i]=records[i].Name;
        }
        //on Document ready
        j$(document).ready(function(){
           
            j$("#apexaccountautocomplete").autocomplete({
                source : apexAccountList
            });
            j$("#sfjscontactautocomplete").autocomplete({
                source : javascriptContactList
            });
        });
    </script>
   
    <apex:form >
        <b>Account(This uses the Apex class to display the list)</b><input type="text" id="apexaccountautocomplete"/><br/><br/>
        <b>Contact(This uses the salesforce's ajax toolkit to display the list)</b><input type="text" id="sfjscontactautocomplete"/>
    </apex:form>
   
</apex:page>