Page loaded

ready = ->
    alert 'Page loaded'

For most browsers:

if document.addEventListener
    document.addEventListener 'DOMContentLoaded', (event)->
        ready()
    , false

And for Internet Explorer:

else if document.attachEvent
    document.attachEvent 'onreadystatechange', ->
        if 'complete' == document.readyState
            ready()

Taken from: http://stackoverflow.com/questions/799981/document-ready-equivalent-without-jquery