Errors:
Internal encoding declaration “iso-8859-1” disagrees with the actual encoding of the document (“utf-8”).
Bad value “text/html; charset=ISO-8859-1” for attribute “content” on element “meta”: “iso-8859-1” is not a preferred encoding name. The preferred label for this encoding is “windows-1252”.
A “charset” attribute on a “meta” element found after the first 1024 bytes.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Element “meta” is missing one or more of the following attributes: “charset”, “content”, “http-equiv”, “itemprop”, “name”, “property”.
Duplicate ID “display_content”.
Duplicate ID “display_search”.
Duplicate ID “search_box”.
Duplicate ID “search_submit”.
Attribute “u” not allowed on element “div” at this point.
Attribute “u” 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.
Attribute “u” not allowed on element “span” at this point.
Attribute “border” not allowed on element “input” at this point.
Attribute “value” not allowed on element “input” at this point.
Element “input” is missing required attribute “alt”.
The “width” attribute on the “table” element is obsolete. Use CSS instead.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
The “align” attribute on the “table” element is obsolete. Use CSS instead.
The “border” attribute on the “table” element is obsolete. Use CSS instead.
The “width” attribute on the “td” element is obsolete. Use CSS instead.
The “valign” attribute on the “td” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
Bad value “true” for attribute “readonly” on element “textarea”.
Attribute “background” not allowed on element “td” at this point.
Bad value “-1” for attribute “colspan” on element “td”: Expected a digit but saw “-” instead.
Element “style” not allowed as child of element “td” in this context. (Suppressing further errors from this subtree.)
Attribute “alt” not allowed on element “a” at this point.
The “font” element is obsolete. Use CSS instead.
Element “div” not allowed as child of element “font” in this context. (Suppressing further errors from this subtree.)
The “language” attribute on the “script” element is obsolete. Use the “type” attribute instead.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “display_content” was here.
The first occurrence of ID “display_search” was here.
The first occurrence of ID “search_box” was here.
The first occurrence of ID “search_submit” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The “main” role is unnecessary for element “main”.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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