Errors found while checking this document as XHTML 1.0 Transitional!

Result: 4 Errors, 1 warning(s)
:
: utf-8
: XHTML 1.0 Transitional
Root Element: html
Root Namespace: http://www.w3.org/1999/xhtml
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Help on the options is available.

Notes and Potential Issues

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.

  1. Info 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.

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Validation Output: 4 Errors

  1. Error Line 421, Column 10: ID "CorpoContenuti" already defined
    <div id="CorpoContenuti" style="text-align: center;"><span style="font-family: …

    An "id" is a unique identifier. Each time this attribute is used in a document it must have a different value. If you are using this attribute as a hook for style sheets it may be more appropriate to use classes (which group elements) than id (which are used to identify exactly one element).

  2. Info Line 300, Column 13: ID "CorpoContenuti" first defined here
    			<div id="CorpoContenuti"><table class="blog" cellpadding="0" cellspacing="0">
  3. Error Line 422, Column 10: ID "CorpoContenuti" already defined
    <div id="CorpoContenuti" style="text-align: center;"><o:p></o:p></div>

    An "id" is a unique identifier. Each time this attribute is used in a document it must have a different value. If you are using this attribute as a hook for style sheets it may be more appropriate to use classes (which group elements) than id (which are used to identify exactly one element).

  4. Info Line 300, Column 13: ID "CorpoContenuti" first defined here
    			<div id="CorpoContenuti"><table class="blog" cellpadding="0" cellspacing="0">
  5. Error Line 422, Column 58: element "o:p" undefined
    <div id="CorpoContenuti" style="text-align: center;"><o:p></o:p></div>

    You have used the element named above in your document, but the document type you are using does not define an element of that name. This error is often caused by:

    • incorrect use of the "Strict" document type with a document that uses frames (e.g. you must use the "Frameset" document type to get the "<frameset>" element),
    • by using vendor proprietary extensions such as "<spacer>" or "<marquee>" (this is usually fixed by using CSS to achieve the desired effect instead).
    • by using upper-case tags in XHTML (in XHTML attributes and elements must be all lower-case).
  6. Error Line 423, Column 10: ID "CorpoContenuti" already defined
    <div id="CorpoContenuti" style="text-align: center;"><span style="font-family: …

    An "id" is a unique identifier. Each time this attribute is used in a document it must have a different value. If you are using this attribute as a hook for style sheets it may be more appropriate to use classes (which group elements) than id (which are used to identify exactly one element).

  7. Info Line 300, Column 13: ID "CorpoContenuti" first defined here
    			<div id="CorpoContenuti"><table class="blog" cellpadding="0" cellspacing="0">

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