Caio a tutti, ho controllato il miosito con Markup Validation Service e non ho nessun problema la validazione passa, poi quando copio il codice da loro fornito nel mio footer cioe questo
<p>
<img
src="http://www.w3.org/Icons/valid-xhtml10"
alt="Valid XHTML 1.0 Strict" height="31" width="88" /> </p>
per inserire l'icona di validazione del sito il validatore Markup Validation Service mi genera questo errore:
ww.w3.org/Icons/valid-xhtml10" border="0" alt="Valid XHTML 1.0 Strict" width="…✉
You have used the attribute named above in your document, but the document type you are using does not support that attribute for this element. This error is often caused by incorrect use of the "Strict" document type with a document that uses frames (e.g. you must use the "Transitional" document type to get the "target" attribute), or by using vendor proprietary extensions such as "marginheight" (this is usually fixed by using CSS to achieve the desired effect instead).
This error may also result if the element itself is not supported in the document type you are using, as an undefined element will have no supported attributes; in this case, see the element-undefined error message for further information.
stessa cosa se copio il codice per l'icona css.
Grazie a tutti...