function mod_project(base, pid) {

  // Temporarily disable the dynamic selects while we retrieve the new info.
  // The newly loaded selects will be enabled by default.
  $("select[@id=edit-rid]").attr("disabled", "disabled");
  $("select[@id=edit-component]").attr("disabled", "disabled");

  // Get existing component seting.
  var cid = $("select[@id=edit-component]").val();
  cid = Drupal.encodeURIComponent(cid);

  // Get existing version label.
  var nid = $("select[@id=edit-rid]").val();
  var rid = $("select[@id=edit-rid] option[@value=" + nid + "]").text();
  rid = Drupal.encodeURIComponent(rid);

  // Ajax GET request.
  $.ajax({
    type: "GET",
    url: base + pid + '/' + cid + '/' + rid,
    success: function (data) {
      // Parse back result
      var result = Drupal.parseJson(data);
      $("#project-issue-rid").empty().append(result['rid']);
      $("#project-issue-component").empty().append(result['component']);
    },
    error: function (xmlhttp) {
      alert('An HTTP error '+ xmlhttp.status +' occured.\n'+ url);
    }
  });
}