function area_small( jc,sc ) {
  var script  = document.createElement( 'script' );
  script.type = 'text/javascript';
  script.src  = '../js_index.php?jc=' + jc + '&sc=' + sc + '&md=oas';
  var head    = document.getElementsByTagName( 'head' )[0];
  head.appendChild( script );
}