Dermalinstitute.com W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Bad value “/us/classes/bookclasses.html?WebLocationID=Chicago, IL” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/us/classes/bookclasses.html?WebLocationID=Los Angeles, CA” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/us/classes/bookclasses.html?WebLocationID=New York, NY” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
United States US