ho reinserito tutta la pagina e gli errori sono i seguenti

Error Line 28, Column 32:

syntax of attribute value does not conform to declared value
<hr size="1" noshade="" align="left" width="717" > ✉
The value of an attribute contained something that is not allowed by the specified syntax for that type of attribute. For instance, the “selected” attribute must be either minimized as “selected” or spelled out in full as “selected="selected"”; the variant “selected=""” is not allowed.

Error Line 28, Column 32:
value of attribute "noshade" cannot be "";
must be one of "noshade" <hr size="1" noshade="" align="left" width="717" >
✉ The value of the attribute is defined to be one of a list of possible values but in the document it contained something that is not allowed for that type of attribute. For instance, the “selected” attribute must be either minimized as “selected” or spelled out in full as “selected="selected"”; a value like “selected="true"” is not allowed.

Error Line 28, Column 60:
end tag for "hr" omitted, but OMITTAG NO was specified <hr size="1" noshade="" align="left" width="717" >
✉ You may have neglected to close an element, or perhaps you meant to "self-close" an element, that is, ending it with "/>" instead of ">".

non capisco cosa non va bene negli hr...ho porvato a mettere tutti gli attributi anche in un css ma nn cambia nulla...