n datepick(field_id,date_start,date_end){
    $('#'+field_id)
            .datePicker(
                        {
                                        createButton:false,
                                                        startDate:date_start,
                                                                        endDate:date_end

                                                                                    }
                                                                                            ).bind(
                                                                                                        'click',
                                                                                                                    function()
                                                                                                                                {
                                                                                                                                                updateSelects($(this).dpGetSelected()[0],$(this).attr("id"));
                                                                                                                                                                $(this).dpDisplay();
                                                                                                                                                                                return false;
                                                                                                                                                                                            }
                                                                                                                                                                                                    ).bind(
                                                                                                                                                                                                                'dateSelected',
                                                                                                                                                                                                                            function(e, selectedDate, $td, state)
                                                                                                                                                                                                                                        {
                                                                                                                                                                                                                                                        updateSelects(selectedDate,$(this).attr("id"));
                                                                                                                                                                                                                                                                    }
                                                                                                                                                                                                                                                                            ).bind(
                                                                                                                                                                                                                                                                                        'dpClosed',
                                                                                                                                                                                                                                                                                                    function(e, selected)
                                                                                                                                                                                                                                                                                                                {
                                                                                                                                                                                                                                                                                                                                updateSelects(selected[0],$(this).attr("id"));
                                                                                                                                                                                                                                                                                                                                            }
                                                                                                                                                                                                                                                                                                                                                    );
                                                                                                                                                                                                                                                                                                                                                        var updateSelects = function (selectedDate)
                                                                                                                                                                                                                                                                                                                                                            {
                                                                                                                                                                                                                                                                                                                                                                    var selectedDate = new Date(selectedDate);
                                                                                                                                                                                                                                                                                                                                                                                    if (selectedDate.getDate()<10){
                                                                                                                                                                                                                                                                                                                                                                                                        $('#'+field_id+'Day option[value=0' + selectedDate.getDate() + ']').attr('selected', 'selected');
                                                                                                                                                                                                                                                                                                                                                                                                                        } else {
                                                                                                                                                                                                                                                                                                                                                                                                                                            $('#'+field_id+'Day option[value=' + selectedDate.getDate() + ']').attr('selected', 'selected');
                                                                                                                                                                                                                                                                                                                                                                                                                                                            }
                                                                                                                                                                                                                                                                                                                                                                                                                                                                            if (selectedDate.getMonth()<9){
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                $('#'+field_id+'Month option[value=0' + (selectedDate.getMonth()+1) + ']').attr('selected', 'selected');
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                } else {
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    $('#'+field_id+'Month option[value=' + (selectedDate.getMonth()+1) + ']').attr('selected', 'selected');
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    }
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            $('#'+field_id+'Year option[value=' + (selectedDate.getFullYear()) + ']').attr('selected', 'selected');
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    $('#'+field_id+'Day, #'+field_id+'Month, #'+field_id+'Year')
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            .bind(
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        'change',
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    function()
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                {
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                var d = new Date(
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            $('#'+field_id+'Year').val(),
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        $('#'+field_id+'Month').val()-1,
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    $('#'+field_id+'Day').val()
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            );
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            $('#'+field_id).dpSetSelected(d.asString());
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        }
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                );
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        $('#'+field_id+'Day').trigger('change');

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            // Can i use drop?
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                $('#'+field_id+'_drop').bind(
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        'click',
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                function()
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        {
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    $('#'+field_id+'Year').val("");
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                $('#'+field_id+'Month').val("");
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            $('#'+field_id+'Day').val("");
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    }
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        );
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        }