fullcalendar qeury event ตาม index ที่เลือกจาก select

//event.php
<?php

header("Content-type:application/json; charset=UTF-8");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
include 'conn.php';
$sel = $_GET['selNot'];
if ($_GET['gData']) {
    $qr = @mysql_query("SELECT title, startDate, endDate, status FROM reservation WHERE NameNoc = " . $sel . "");
    while ($rs = @mysql_fetch_assoc($qr)) {
        if ($rs["status"] == 'wait') {
            $color = 'yellow';
        } else if ($rs["status"] == 'accept') {
            $color = 'green';
        } else if ($rs["status"] == 'unaccept') {
            $color = 'red';
        }
        $json_data[] = array(
            "title" => $rs["title"],
            "start" => $rs["startDate"],
            "end" => $rs["endDate"],
            "color" => $color,
            "allDay" => true
        );
    }
}
$json = json_encode($json_data);
if (isset($_GET['callback']) && $_GET['callback'] != "") {
    echo $_GET['callback'] . "(" . $json . ");";
} else {
    echo $json;
}
?>

//javascript
function OnSelctNotice(Notice) {
    var selectedOption = Notice.options[Notice.selectedIndex];
    var sel = selectedOption.value;
    alert(sel);
 $(function () {
        $('#calendar').fullCalendar({
            header: {
                left: 'prev,next today', 
                center: 'title',
                right: 'month',
            },
            buttonIcons: {
                prev: 'left-single-arrow',
                next: 'right-single-arrow',
                prevYear: 'left-double-arrow',
                nextYear: 'right-double-arrow'
            },
            
            events: {
                url: 'event.php?gData=1&sel=' sel '',
                
                error: function () {
                   
                },
                success: function (){
                    console.log(sel);
                } 
            },
            eventLimit: true,
            lang: 'th',
          
        });
    });
}