rails 3.1, capybara-webkit, how to execute javascript inside link?

Question

Can I execute a javascript in a link with capybara click_link('next_page') ?

The link looks like this:

<a onclick="$('#submit_direction').attr('value', '1');$('#quizForm').submit()" id="next_page" href="#">Next Question</a>

I read at capybara at github that I can submit a form by click at its submit button like this:

click_on('Submit Answer')

But, in my case, I need to submit the form using javascript in a link, so, how to test the link that has javascript inside ? isn't click_link('next_page') sufficient ?

EDIT

after setting :js=> true my test looks like this:

   it "should pass when answering all correct", :js=>true  do

    login_as(student, :scope => :student)
    visit ("/student_courses")

    #page.execute_script("$('#submit_direction').attr('value', '1');$('#quizForm').submit()")

    trace "HTML:------------", page.html

  end

Before :js=> true, I could visit the page normally, But, I've noticed that the page cannot be visited after :js=> true, here is the error I got after visiting the page:

Started GET "/student_courses" for 127.0.0.1 at 2012-01-23 06:29:26 +0200 (5010.7ms) UPDATE "students" SET "last_sign_in_at" = '2012-01-23 04:29:26.274285', "current_sign_in_at" = '2012-01-23 04:29:26.274285', "last_sign_in_ip" = '127.0.0.1', "current_sign_in_ip" = '127.0.0.1', "sign_in_count" = 1, "updated_at" = '2012-01-23 04:29:26.276279' WHERE "students"."id" = 1 SQLite3::BusyException: database is locked: UPDATE "students" SET "last_sign_in_at" = '2012-01-23 04:29:26.274285', "current_sign_in_at" = '2012-01-23 04:29:26.274285', "last_sign_in_ip" = '127.0.0.1', "current_sign_in_ip" = '127.0.0.1', "sign_in_count" = 1, "updated_at" = '2012-01-23 04:29:26.276279' WHERE "students"."id" = 1 HTML:------------__ Internal Server Error

Internal Server Error

cannot rollback transaction - SQL statements in progress

---

WEBrick/1.3.1 (Ruby/1.9.3/2011-10-30) at 127.0.0.1:34718

so, why SQLite3::BusyException: database is locked now ?!