$('#date-pick').datePicker(// associate the link with a date picker
{
    createButton: false,
    startDate: '01/01/2005',
    endDate: '31/12/2010'
}).bind(// when the link is clicked display the date picker
'click', function(){
    updateSelects($(this).dpGetSelected()[0]);
    $(this).dpDisplay();
    return false;
}).bind(// when a date is selected update the SELECTs
'dateSelected', function(e, selectedDate, $td, state){
    updateSelects(selectedDate);
}).bind('dpClosed', function(e, selected){
    updateSelects(selected[0]);
});

var updateSelects = function(selectedDate){
    var selectedDate = new Date(selectedDate);
    $('#d option[value=' + selectedDate.getDate() + ']').attr('selected', 'selected');
    $('#m option[value=' + (selectedDate.getMonth() + 1) + ']').attr('selected', 'selected');
    $('#y option[value=' + (selectedDate.getFullYear()) + ']').attr('selected', 'selected');
}
// listen for when the selects are changed and update the picker
$('#d, #m, #y').bind('change', function(){
    var d = new Date($('#y').val(), $('#m').val() - 1, $('#d').val());
    $('#date-pick').dpSetSelected(d.asString());
});

// default the position of the selects to today
var today = new Date();
updateSelects(today.getTime());

// and update the datePicker to reflect it...
$('#d').trigger('change');