Checking my HTML with Amaya I detected that my navigation symbols (i. e. chapter forward) with `border="0"` are marked as deprecated. How to overcome this restriction? I don't want that my chapter forward symbol to be represented as link.

Example:
`<a href="...URL..."><img alt="chapter forward" src="../images/chforw.gif" border="0"></a>`

I've tried CSS `img {border:none }`, but this disable the link representation in all circumstances.