function nav(dir) {
  var postData = {
    game_id: "{{.ActiveGame.ID}}",
    src: $("#txtSrc").val(),
    trans: $("#txtTrans").val(),
    untrans: $("#untranslated").is(":checked"),
    direction: dir,
    {{if eq .Mode 0 }} //note this should not be valid js/html syntax
    image: VisualTranslation.getPic(),
    overlay: VisualTranslation.getData(),
    {{end}}
    tid: trans_id,
    lang:"{{.ActiveLang}}",
    mode:"{{.Mode}}"
  };

  $.ajax({
    url: "/api/next",
    type: "POST",
    data: postData
    )}
  }