ajax버튼 질문드립니다. 채택완료

</p>

<p>  </p>

<p><script type="text/javascript">

function count_update(serial_num){</p>

<p>    //console.log("serial_num : "+serial_num);</p>

<p>    $.ajax({

        url : "<a href="http://dy-sellcar.com/works/consulting_count_ajax.php"," target="_blank" rel="noopener noreferrer">http://dy-sellcar.com/works/consulting_count_ajax.php",</a>

        type : "GET",

        cache : false,

        dataType : "text",

        data : "serial_num="+serial_num,

        success : function(data){</p>

<p>            //alert('data = '+ data);</p>

<p>            if (data > 0) {

                //alert(data);

                $('#count_num'+serial_num).html(data);</p>

<p>            } else {

                alert('허용된 인원 초과');

            }</p>

<p>        }

    });

}

</script></p>

<p>

</p>

<p><?

    $root = $_SERVER['DOCUMENT_ROOT'] ."/";

    include "{$root}db.inc.php";

    include "{$root}config.inc.php";</p>

<p>    $serial_num = $_GET['serial_num'];

    //echo $serial_num;</p>

<p>    $sql_sel = "select etc_3 from TCBOARD_BD10438 where serial_num = ".$serial_num;

    $result = mysql_fetch_array(mysql_query($sql_sel));</p>

<p>    if($result['etc_3'] > 0){

        $sql = "update TCBOARD_BD10438 set etc_3 = etc_3-1 where serial_num = ".$serial_num;

        mysql_query($sql);    

        echo $result['etc_3'];

    } else {

        echo 0;

    }

?></p>

<p>