Picture naming to denote order

Good evening

I need some help please. I have 2 pictures and currently both are labeled img. How can I change them so that I can denote so I can do different things to each one? FOr example img 1 and img 2.

thank you

You may use diffrent ids for each img like:

<img id="img-1" src="smiley.gif">
<img id="img-2" src="smiley.gif">

thank you - I was making it a lot harder than it was.