gistfile1.txt

document.observeSelect = function(){
  $$('select.get').invoke('stopObserving', 'change');
  $$('select.get').invoke('observe', 'change', function(event){
    var e = event.element();
    if(e.isActive()){
      e.indicate();
      document.ajaxRequest(e, e.readAttribute('src'), 'get', event, e.serialize());
    };
  });
};