robotframework selenium-library can be used to generate documentation too

*** Setting ***
Library    SeleniumLibrary

Suite Setup    Suite Init   
Suite Teardown     Suite Term 

*** Variable ***
${BROWSER}    firefox

*** Test Cases ***
test1
    go to    http://google.com
    Capture Page Screenshot    goo.png
test2
    go to    http://yahoo.co.uk
    Capture Page Screenshot    yah.png
test3
    go to    http://msn.co.uk
    Capture Page Screenshot    msn.png

*** Keywords ***
Suite Init
    open browser    http://google.com   ${BROWSER}
    set window size    800    600

Suite Term 
    close browser