Petro.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Bad value “Expires” for attribute “http-equiv” on element “meta”.
Bad value “cache-control” for attribute “http-equiv” on element “meta”.
Bad value “Pragma” for attribute “http-equiv” on element “meta”.
Bad value “https://fonts.googleapis.com/css?family=Roboto+Slab:400,300,700|Montserrat:200,400” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
Attribute “displaymode” not allowed on element “img” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “submenus”.
Duplicate attribute “src”.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The first occurrence of ID “submenus” was here.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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