how to unbind e.g datepicker

how to unbind e.g datepicker


hi,
i'm not sure how to unbind a datepicker...
html is:

Date: <input type="text" id="datepicker">


<a href="#" id="load">load datepicker</a><br />
<a href="#" id="unload">unload datepicker</a><br />
javascript:
$(document).ready(function() {
    var loadfn = function () {
        $("#datepicker").datepicker({
        showOn: 'button',
        buttonImage: 'templates/images/calendar.gif',
        buttonImageOnly: true
        });
    };
    $("#load").click(loadfn);
});
is there a possibility to use something like
$("#unload").unbind('click', unloadfn) ?
how looks this function like?
or must i use datepicker( "disable" )?
best regards m
cologne