Mine

<input type="text" name="date_new" id="date_new" size="10" maxlength="10" readonly value="<?= ( $modify === true ) ? $new_until : $_POST['date_new'] ?>" /><?            echo "<img id=\"start_date_cal\" src=\"".BASE_HREF."/images/buttons/calendar.gif\" />";            echo "            <script type=\"text/javascript\">                Calendar.setup                ({                    inputField : \"date_new\",                    ifFormat : \"%m/%d/%Y\",                    button : \"start_date_cal\",                    eventName : \"click\",                    align : \"bR\",                    firstDay : 0,                    weekNumbers : false,                    cache : true,                    showOthers : true,                    step : 1                });