$(function(){

  $('input[name="_method"][value="delete"]').parents('form').submit(function(){
    return confirm('Are you sure?');
  });

  $('form:first input[type="text"]:first').focus();

  if ($('div#flash div').length) {
    setTimeout(function(){
      $('div#flash div').slideUp('fast');
    }, 3000);
  };

})