Make my sound on my iphone3gs work

[ChallengerX]

So i was watching clips on safari then the sound just stops working. I press the bottens on my side and nothing shows up. Also when u watch a movie or clip it has no sound thing on the bottom. Plz help. I cant do any thing about it. Thnx

 

[hang-the-9]

Reboot the phone and check things again. If the only sound that is not working from Safari?