CSS and frameset?

Question

I have an .html document of XHTML 1.0 Frameset doctype and I'm using the following code:

  <frameset rows="20%, 80%" border="1">
   ...
  </frameset>

When putting the above .html code in W3C Validator I get the following error:

there is no attribute "border" in frameset.

What can I do, in order to prevent this error? I tried creating a css file with:

frameset {
   border: 1px;
}

but didn't seem to work.

Please don't comment/answer telling me how bad frames are (I know by myself).

Answer 1

Short answer, use this instead:

<frameset ...>
   <frame frameborder="xx"/>
</frameset>

[see http://www.codingforums.com/archive/index.php/t-10259.html ]

Answer 2

What if you gave your frameset a class and then put the class in the stylesheet?