Assets Folder

Hello everybody,

I accidentally deleted the assets folder.
When i try to run my project, i see this message:

Failed to load resource: the server responded with a status of 404 (Not Found)
localhost/best_quotes/assets/f1f65891/jquery.js

What's the solution?
Does this request come from the code: Yii::app()->clientScript->registerCoreScript("jquery") ?

How can i restore my project?
I think yii will generate the assets folder automatically.