How to use watir-webdriver to wait for page load

Question

Using watir-webdriver, how do I wait for a page to load after I click a link?

At the moment I am using:

sleep n

But this is not ideal a

Answer 1

I don't know if they're the best way, but this is how I'm handling this for waiting for an updating div to clear:

while browser.div(:id=>"updating_div").visible? do sleep 1 end

This is how I handle waiting for something to display:

until browser.div(:id=>"some_div").exists? do sleep 1 end