jQuery autocomplete turn off
<h2>1st question</h2>

<p>I have a dropdownlist, filled with countries (from xml file).</p>

<p>When you choose a country, you can use the autocomplete for a textbox.
This autocomplete has postal codes from the choosen country.</p>

<p>Now I want to set the autocomplete off right after the dropdownlist.change event
for preventing that the autocomplete (filled with postal codes) for 1 country also work for another country. But how do you turn it off?</p>

<p>Code:</p>

<pre><code>//when changing country, other postcodes will load
        $('[id$=landenDropDown]').change(function () {

            //autocompletes removal
            ...

            $('[id$=POSTCODETextBox]').html("");

            var LandCode = $('[id$=landenDropDown]').attr("value");

            //autocomplete with postal codes for Belgium
            if (LandCode == "BE") {
                //autocomplete postcode from selected country
                $('[id$=POSTCODETextBox]').autocomplete("PostcodeBE.aspx");

            }
             //autocomplete with postal codes for Holland
            else if (LandCode == "NL") {
                //autocomplete postcode from selected country
                $('[id$=POSTCODETextBox]').autocomplete("thingXml.aspx");

            }

            else {
                //test
                getal += 1;
                alert(getal);
            }
</code></pre>

<p>The problem is when the autocomplete is finished and select an other country
that this autocomplete still exist, even when it doesnt have to show up.</p>
