I require a button to be a link to a new window.
My code works in all desktop browsers I have tried so far, however when I run it through the W3C validator I get the error below;
The element button must not appear as a descendant of the a element.
<a href="http://www.example.com"><button type="button" class="btn btn-success">contact</button></a>
If somebody could tell me how it should look in order to be sematically correct I would be very grateful.
Note I am using the bootstrap framework hence the btn class.
You already answered your question. The HTML is invalid.
Just give the a element the classes that the button element had:
<a class="btn btn-success" href="http://www.example.com">contact</a>
Example Here - the appearance is the same.