Qhov piv txwv no yog ib qho kev tawm dag zog sai los piav qhia seb lub neej ntawd li cas, zoo li qub thiab ruaj khov rau saum navbar ua haujlwm. Nws suav nrog cov teb CSS thiab HTML, yog li nws kuj yoog rau koj qhov chaw saib thiab ntaus ntawv.
Txhawm rau pom qhov sib txawv ntawm qhov zoo li qub thiab ruaj khov sab saum toj navbars, tsuas yog scroll.