Date picker in Jade

I am stuck trying to get a datepicker to work using Jade. Framework is node.js and express.

I load the javascripts in index.jade like this:

link(type='text/css', href='css/ui-lightness/jquery-ui-1.9.1.custom.min.css',  rel='stylesheet')
script(src='js/jquery-1.8.2.js', type='text/javascript')
script(src='js/jquery-ui-1.9.1.custom.min.js', type='text/javascript')
script(src='js/i18n/jquery-ui-i18n.min.js', type='text/javascript')

I have tried several ways of using these javascripts in code beneath, but there must be something I am missing. I found these lines of code on the same spot i found the referance to the jQuery libraries:

$(function(){
 $.datepicker.setDefaults(
 $.extend($.datepicker.regional[""])
 );
 $("#datepicker").datepicker();
});

How can I express or use that in Jade?

Thanks for any answers.