$(function () {

$("#pid_sp").change(function () {
    var pid = $(this).val();
    if (pid == '') { return false; }
    location.href = '../list/index.php?pid='+pid+'&sp=1';
});
$("#pid_tr").change(function () {
    var pid = $(this).val();
    if (pid == '') { return false; }
    location.href = '../list/index.php?pid='+pid+'&tr=1';
});
$("#pid_bk").change(function () {
    var pid = $(this).val();
    if (pid == '') { return false; }
    location.href = '../list/index.php?pid='+pid+'&bk=1';
});

});