execute javascript on every reload - ruby on rails

I am reloading partial using ajax this way:

new Ajax.PeriodicalUpdater('content', '/shouts/update.js', { method: 'get', frequency: 1});

The reload is working great.

I added this javascrip开发者_StackOverflowt code to update.js to make the partial content fade:

$('content').fade({ duration: 3.0, from: 0, to: 1 });

And the problem is that nothing happens (the content doesn't fade).

What do you think is the problem?

I think the problem is that there is no fade function in JQuery... Try fadeTo

$('content').fadeTo(3000, 0);

also there is the function fadeToggle(). There you have a simple switch :)

UPDATE: thought it is was jquery... within Ajax.PeriodicalUpdater you can set the parameter evalScripts to true then the script will be available... http://api.prototypejs.org/ajax/Ajax/Updater/