#4 pages invalid

[Christopher Yeleighton]

The pages produced by info2html are invalid. First of all, they have no DOCTYPE, which makes them render in quirks mode. Moreover, the ALT attribute for images is missing.
See e.g. <URL:http://validator.w3.org/check?uri=http://info2html.sourceforge.net/cgi-bin/info2html-demo/info2html?(texinfo)Overview&charset=(detect+automatically)&doctype=Inline&group=0>