jquery.js：9631 POST：404（未找到）

Question

这是我的ajax代码但是当我调用第二个函数时它会抛出错误

  

jquery.js：9631错误

在这种情况下：

$(document).ready(function() {
  $("#set_value").click(function() {
    var due = document.getElementById("due_date").value;
    var freq = document.getElementById("frequency").value;

    if (due != null && freq != null && due != "" && freq != "") {
      $.ajax({
        type: "POST",
        url: "../blocks/mailer/logic.php",
        data: {
          due_days: due,
          frequency: freq,
          courseid: '.$COURSE->id.'
        }
      }).done(function(data) {
        alert(data);
        location.reload();
      });
    } else {
      alert("Due frequency and Frequency dont be null");
      document.getElementById("set_value").focus();
    }
  });

  $("#mod_value").click(function() {
    var due = document.getElementById("due_date").value;
    var freq = document.getElementById("frequency").value;

    if (due != null && freq != null && due != "" && freq != "") {
      $.ajax({
        type: "POST",
        url: "../blocks/mailer/mod/modify.php",
        data: {
          due_days: due,
          frequency: freq,
          courseid: '.$COURSE->id.'
        }
      }).done(function(data) {
        alert(data);
        location.reload();
      });
    } else {
      alert("Due frequency and Frequency dont be null");
      document.getElementById("set_value").focus();
    }
  });
});