Errors:
Obsolete doctype. Expected “<!DOCTYPE html>”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “_new” for attribute “target” on element “a”: Reserved keyword “new” used.
Duplicate ID “bookSmallOptions”.
Attribute “clas” not allowed on element “li” at this point.
Duplicate ID “maincontent”.
The “center” element is obsolete. Use CSS instead.
No “p” element in scope but a “p” end tag seen.
Duplicate ID “bookOptions”.
Attribute “border” not allowed on element “iframe” at this point.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginwidth” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “last”.
Stray start tag “script”.
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The first occurrence of ID “bookSmallOptions” was here.
The first occurrence of ID “maincontent” was here.
The first occurrence of ID “bookOptions” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “last” was here.
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