รบกวนแนะนำทีครับ อยากสร้าง button พอกด แล้วส่งค่า A ออกไปเก็บไว้ที่ database

<button id="send" value="A">send</button>
<script>
$(document).ready(function() {
    $('#send').click(function(){
        var val = $(this).val();
        alert(val);
       //ไปหาเรื่อง .post jquery อ่านต่อ
    });
 });

<select name="selectemp" size="1" id="selectemp">
          <option value="เลือกอุณหภูิม">เลือกอุณหภูมิ</option>
          <option value="18">18</option>
          <option value="19">19</option>
          <option value="20">20</option>
          <option value="21">21</option>
          <option value="22">22</option>
          <option value="23">23</option>
          <option value="24">24</option>
          <option value="25">25</option>
    </select>

alert($("#selectemp").val());

<?php

# FileName="Connection_php_mysql.htm"
# Type="MYSQL"
# HTTP="true"
$hostname_myconnect = "localhost";
$database_myconnect = "home control";
$username_myconnect = "root";
$password_myconnect = "12345678";
$myconnect = mysql_pconnect($hostname_myconnect, $username_myconnect, $password_myconnect) or trigger_error(mysql_error(),E_USER_ERROR);

mysql_slect_db($database_myconnect) or die(mysql_error());
$cs1 = "SET character_set_results=utf8";
$cs2 = "SET character_set_client=utf8";
$cs3 = "SET character_set_connection=utf8";
@mysql_query($cs1) or die('Error query:'.mysql_error());
@mysql_query($cs2) or die('Error query:'.mysql_error());
@mysql_query($cs3) or die('Error query:'.mysql_error());

$sql="insert into on_off(on1,off1) values(".$_POST["on1"].",".$_POST["off1"].")"; 
mysql_query($sql);
echo "Complete";
?>

Code
<button id="on1" value="A" onclick="on(1);">On</button>
 <button id="off1" value="a" onclick="off(1);">Off</button>

 <script>

$(document).ready(function() {
    $('#on1').click(function(){
        var on1 = $(this).val();
        alert(on1);
       
    });
});


$(document).ready(function() {
    $('#off1').click(function(){
        var off1 = $(this).val();
        alert(off1);
        });
});
 


$.ajax({
  method: "POST",
  url: "myconnect.php",
  data: {on1:on1,off1:off1}
})
  .done(function( msg ) {
    alert( "Data Saved: " + msg );
  });


 </script>

     

$sql="insert into on_off(on1,off1) values(".$_POST["on1"].",".$_POST["off1"].")";