var cal = function ( YY, MM ){
  new Ajax.Updater(
    'calendar',
    'index.cgi',
    {
      'method'     : 'POST',
      'parameters' : 'c=calendar&YY=' + YY + '&MM=' + MM
    }
  );
}
var myLoad = function () {
  if ( $('calendar') ) {
    cal();
  }
}

var pageSeek = function ( sk ) {
  document.skForm.sk.value=sk;
  document.skForm.submit();
}

Event.observe( window, 'load', myLoad, false );