This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
The validator reports a bogus XHTML error because it is incorrectly parsing the original markup. Validate http://www.enkon.com/ and you see an error report for the line: Error Line 568, column 199: there is no attribute "border" . ...f=1','_blank');return false;" border="0" /> However, if you look at the actual code, border="0" does not exist! Here's the real HTML output from the site: f=1','_blank');return false;" style="border-width:0px;" /> It looks like the parser is misinterpreting the original code and therefore reporting a bogus error.
I am not sure what you are looking at, please use the Validator's show source option and jump to the line in the source using the linkin the error message, I get <input type="image" name="ctl00$imgbtnpf" id="ctl00_imgbtnpf" src="images/printfriendly.gif" onclick="window.open('/Default.aspx?pf=1','_blank');return false;" border="0" /> not the code you are talking about. The server might be trying to recognize the client and emit code depending on that, so the Validator might not get the code you can see in browser when visiting the site.