<a href="javascript: openNext('000001')"><img /></a>

<div id="somecontainer">
    <a href="#000001"><img /></a>
    ...
</div>

<script type="text/javascript">
$(function() {
    $('#somecontainer a').click(function() {
        var id = $(this).attr('href').substring(1);
        openNext(id);
        return false;    // to cancel native click event
    });
});
</script>