The following notes and warnings highlight missing or conflicting information which caused the validator to perform some guesswork prior to validation, or other things affecting the output below. If the guess or fallback is incorrect, it could make validation results entirely incoherent. It is highly recommended to check these potential issues, and, if necessary, fix them and re-validate the document.
No Character Encoding Found!
Falling back to
windows-1252.
None of the standards sources gave any information on the character encoding
labeling for this document. Without encoding information
it is impossible to reliably validate the document. As a fallback
solution, the "windows-1252"
encoding was used to read the content and attempt to perform the validation,
but this is likely to fail for all non-trivial documents.
Before defaulting to windows-1252
the validator also tried to read the content with the following encoding(s), without success:
UTF-8.
Read the FAQ entry on character encoding for more details and pointers on how to fix this problem with your document.
DOCTYPE Override in effect!
The DOCTYPE Declaration for "HTML 4.01 Transitional" has been inserted at the start of the document, but even if no errors are shown below the document will not be Valid until you add the new DOCTYPE Declaration.
No Character encoding declared at document level
No character encoding information was found within the document, either in an HTML meta element or an XML declaration. It is often recommended to declare the character encoding in the document itself, especially if there is a chance that the document will be read from or saved to disk, CD, etc.
See this tutorial on character encoding for techniques and explanations.
<SCRIPT LANGUAGE="JavaScript">
The attribute given above is required for an element that you've used, but you have omitted it. For instance, in most HTML and XHTML document types the "type" attribute is required on the "script" element and the "alt" attribute is required for the "img" element.
Typical values for type are
type="text/css" for <style>
and type="text/javascript" for <script>.
<CENTER>
The mentioned element is not allowed to appear in the context in which you've placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might mean that you need a containing element, or possibly that you've forgotten to close a previous element.
One possible cause for this message is that you have attempted to put a block-level element (such as "<p>" or "<table>") inside an inline element (such as "<a>", "<span>", or "<font>").