HTML - Can I use a same ID and NAME on two different web page?

Question

I know that ID and NAME should be unique to a page.

however, I would like to know whether or not it is valid to use a same ID and NAME on different pages.

For example:

<img alt="" src="images/shadow.png" id="shadow" name="shadow"/>

Whether or not it is valid to include this statement to all pages?

Thank you

Answer 1

this is fine. it only has to be unique to a page