How to mute an iframe?

Question

I need to mute an iframe, but I don\'t know how to do it. Here is an example of what I have:

http://www.codecademy.com/en/bitAce74593/codebits/nW7U9b

Here

Answer 1

you can mute it by js, example: just put this in your page:

you should replace "video1" by the id of your iframe, if the iframe don't have any id add an id to it as follow: