- Biura rachunkowe
Check the markup (HTML, XHTML, …) of Web documentsError found while checking this document as HTML5!Notes and Potential IssuesThe following notes and warnings highlight missing or conflictinginformation which caused the validator to perform some guessworkprior to validation, or other things affecting the output below. Ifthe guess or fallback is incorrect, it could make validationresults entirely incoherent. It is highly recommended tocheck these potential issues, and, if necessary, fix them andre-validate the document. Using experimentalfeature: HTML5 Conformance Checker.The validator checked your document with an experimental feature:HTML5 Conformance Checker. This feature has been madeavailable for your convenience, but be aware that it may beunreliable, or not perfectly up to date with the latest developmentof some cutting-edge technologies. If you find any issues with thisfeature, please report them. Thank you. Byte-OrderMark found in UTF-8 File.The Unicode Byte-Order Mark (BOM) in UTF-8 encoded files is knownto cause problems for some text editors and older browsers. You maywant to consider avoiding its use until it is better supported.