CSE HTML Validator Home

HTML Validator, CSS Validator, robots.txt Tester, JSON Validator, and Cache Manifest Validator

Powered by CSE HTML Validator Pro

Check your HTML, XHTML, CSS, JSON, robots.txt, and cache manifest files.

Message Summary

contains errors

CSE HTML Validator Professional generated 1 error message and 6 warning messages when checking this web page. These problems could damage this web page's search engine rankings as well as cause viewing problems for visitors. It is highly recommended that any problems be corrected. Why validate?

URL: <http://iincentive-indonezja.pl/>, Local Time: 11:44:39 PM, Date: Tuesday, August 23, 2016

Messages (errors first)

Error1When http-equiv="refresh", the content attribute must be 1) a valid non-negative integer or 2) a valid non-negative integer, followed by a ";" character, followed by one or more space characters, followed by "URL=" (case insensitive), followed by a valid URL that does not start with a quotation character. NOTE: Not including "URL=" or "url=" in front of the URL is a common mistake.

<html><head><meta http-equiv="refresh" content="0;url=http://search.frontier.com/search/?q=http://iincentive-indonezja.pl/&t=0"/></head><body><script>window.location="http://search.frontier.com/search/?q="+escape(window.location)+"&r="+escape(document.referrer)+"&t=0";</scrip...

Warning1[24] A document type declaration should appear as the first line (line 1) of every HTML document. For example, for HTML5 documents use <!DOCTYPE html>. For HTML 4.01 Strict documents use <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">. For HTML 4.01 Transitional documents, use <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">. Although HTML recommendations generally require this line, most browsers probably ignore it. If you're using HTML Validator's integrated editor, then this can be added from the 'Tags' menu or from the HTML Inserter.

<html><head><meta http-equiv="refresh" content="0;url=http://search.frontier.com/search/?q=http://iincentive-indonezja.pl/&t=0"/></head><body><script>w...

Warning1Not using a DOCTYPE will likely trigger quirks mode in browsers. If possible, quirks mode should be avoided in favor of standards mode. Visit http://en.wikipedia.org/wiki/Quirks_mode for more information about quirks mode. Note that the recommended DOCTYPE to use now is HTML5, which is simply <!DOCTYPE html>.

<html><head><meta http-equiv="refresh" content="0;url=http://search.frontier.com/search/?q=http://iincentive-indonezja.pl/&t=0"/></head><body><script>w...

Warning1The natural primary language is not specified. It is highly recommended that the "lang" and/or "xml:lang" (for XHTML) attributes be used with the "html" element to specify the primary language. For example, add the attribute lang="en" for English or lang="fr" for French. Specifying the language assists braille translation software, speech synthesizers, translation software, and has other benefits.

<html><head><meta http-equiv="refresh" content="0;url=http://search.frontier.com/search/?q=http://iincentive-indonezja.pl/&t=0"/></head><body><script>windo...

Warning1[32] No title was found. In most situations, the document should be given a title by using the "title" element in the document's "head" section. HTML 4.01 and XHTML require exactly one "title" element for each document. Note that HTML5+ allows the "title" element to be omitted when the title is provided by a higher-level protocol, like the subject line of an e-mail message when HTML is used as the email format, or when the document is an "iframe srcdoc" document.

<html><head><meta http-equiv="refresh" content="0;url=http://search.frontier.com/search/?q=http://iincentive-indonezja.pl/&t=0"/></head><body><script>window.loca...

Warning1[64] "&t" is an invalid character reference in the value for the "content" attribute. This may be because the '&' character was not escaped as "&amp;". To use a literal ampersand it must be encoded as "&amp;" (even in URLs) because '&' is an escape character in HTML/XHTML.

<html><head><meta http-equiv="refresh" content="0;url=http://search.frontier.com/search/?q=http://iincentive-indonezja.pl/&t=0"/></head><body><script>window.location="http://search.frontier.com/search/?q="+escape(window.location)+"&r="+escape(document.referrer)+"&t=0";</scr...

Warning1The document character encoding was not found in the HTTP headers or within this document's "head" section. It is highly recommended that the encoding be specified in at least one of those places. An example "meta" tag for HTML5 documents is (if possible, place this immediately after the "head" start-tag): <meta charset="utf-8">. Visit https://www.htmlvalidator.com/help.php?m=3&h=webservercharset for web server charset configuration help.

<html><head><meta http-equiv="refresh" content="0;url=http://search.frontier.com/search/?q=http://iincentive-indonezja.pl/&t=0"/></head><body><script>window.location="http://search.frontier.com/search/?q="+escape(window.location)+"&r="+escape(document.referrer)+"&t=0";</script></body>...

NOT SHOWN: CSE HTML Validator Online (OnlineWebCheck.com) does not show: bad & broken links, SEO (search engine optimization) messages, mobile messages, misspelled words, accessibility messages, tip messages, JavaScript lint messages, and messages other than errors and warnings.

HTTP Headers

HTTP headers are sent by the web server to provide additional information about the server and the requested document.

Results by CSE HTML Validator Professional for Windows.

Get the Desktop App for Windows (FREE for Personal Use)