Specify a certain checkbox, not every single one on the page?

Specify a certain checkbox, not every single one on the page?

Specify a certain checkbox, not every single one on the page?

  1. $(document).ready(function(){
  2.     $("select").change(function () {
  3.           id = null;
  4.           $("select option:selected").each(function () {
  5.                 id = $(this).val();
  6.               });
  7.           
  8.           $.get("_getPos.php", { cat: id },
  9.                 function(data){
  10.                 $('#pos').val(data);
  11.             });
  12.             
  13.         }).change();
  14. });
How do I specify in my selector that I want to link the .change() function only to the select form with the id of "pos_selector"?

Thanks.