function initForm() {
  document.forms[0].operation.options[0].selected = true;
  initLayerSelector(document.forms[0]);

  // re-initialize the rubber-band zoom in case the map image
  // has moved to make way for the legend
  if (!clickInProgress) initRubberBandZoom();

  // really only necessary when the user presses the browser's back button
  document.forms[0].action.value = "none";
}

function submitAction(actionName) {
  var form = document.forms[0];
  form.action.value = actionName;
  form.submit();
}