How do I trigger an event with jquery datepicker? [closed]

Question

I am not very proficient with JS and currently I have the links that have the onclick event

<p><a onclick="return dateSelected('2012-10-23', '2')" href="#">2012-10-23</a></p>

<script>
function dateSelected(date, id){
    function1(date,truckid);
}
<script>

now I added this, but I have no idea how to trigger the event to click:

<div id="datepicker"></div>
<script>
            $(function() {
                $( "#datepicker" ).datepicker();
            });
<script>