Event.observe(window, 'load', function() {
  var element = $A($('form').getElementsByTagName('*')).find(function(e) {
    return (e.tagName.toLowerCase() == 'input' && (e.type == 'text' || e.type == 'password'))
        || e.tagName.toLowerCase() == 'textarea'
        || e.tagName.toLowerCase() == 'select';
  });
  if (element && element.value == '') {
    element.focus();
  }
});