//<![CDATA[
var mygmap_child;
function handle_child(loc_id, url, zoom, param) {
  if (mygmap_child && !mygmap_child.closed) {
    mygmap_child.mygmap_hoge(loc_id, zoom);
  } else {
    mygmap_child = window.open(url, 'child', param);
  }
  mygmap_child.focus();
  return;
}
//]]>