document.observe( 'dom:loaded', function(){
  var currentWindow;
  var newWindow = function( event ){
    var el = event.element();
    if ( el.hasClassName('no-new-window') ){
      return;
    }
    currentWindow = window.open( el.href, 'rep_window',
      'scrollbars=1, width=550, height=600' );
    currentWindow.focus();
    event.stop();
  };
  $$( 'map area' ).invoke( 'observe', 'click', newWindow );
});