Hello friends!. This is my first time to learn Js. I'm confused to get this codes.
See the attached image. I've seen there an image called pic_bulboff.gif in img html tag, that I marked with red color. Unfortunately, I didn't find any HTML tag with pic_bulbon.gif back there in this Tryit Editor , (I marked by green) Even how is it possible to show this image {pic_bulbon.gif) there by clicking on the " Turn on the light" button?
Thanks in advance.