al validatore mi dà questi errori ,sapete mica s occorre introdurre questo simbolo per risolver? °
Purtroppo mi comapre un cerchietto se loinserisco ai punti di errore .....che fare?

<table width="830" height="2026" border="0" align="center" cellpadding="0" cellsYou have used the attribute named above in your document, but the document type you are using does not support that attribute for this element. 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 "Transitional" document type to get the "target" attribute), or by using vendor proprietary extensions such as "marginheight" (this is usually fixed by using CSS to achieve the desired effect instead).

This error may also result if the element itself is not supported in the document type you are using, as an undefined element will have no supported attributes; in this case, see the element-undefined error message for further information.

How to fix: check the spelling and case of the element and attribute, (Remember XHTML is all lower-case) and/or check that they are both allowed in the chosen document type, and/or use CSS instead of this attribute. If you received this error when using the <embed> element to incorporate flash media in a Web page, see the FAQ item on valid flash.


Error Line 144 column 23: non SGML character number 146.
L��acronimo A.I.A.D.S. significa : “AssoYou have used an illegal character in your text. HTML uses the standard UNICODE Consortium character repertoire, and it leaves undefined (among others) 65 character codes (0 to 31 inclusive and 127 to 159 inclusive) that are sometimes used for typographical quote marks and similar in proprietary character sets. The validator has found one of these undefined characters in your document. The character may appear on your browser as a curly quote, or a trademark symbol, or some other fancy glyph; on a different computer, however, it will likely appear as a completely different character, or nothing at all.

Your best bet is to replace the character with the nearest equivalent ASCII character, or to use an appropriate character entity. For more information on Character Encoding on the web, see Alan Flavell's excellent HTML Character Set Issues reference.

This error can also be triggered by formatting characters embedded in documents by some word processors. If you use a word processor to edit your HTML documents, be sure to use the "Save as ASCII" or similar command to save the document without formatting information.

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Error Line 144 column 73: non SGML character number 147.
...nimo A.I.A.D.S. significa : “Associazione ✉

Error Line 145 column 53: non SGML character number 148.
Italiana Amici della Scimitarra��. L’A.I.A.D.S. ✉

Error Line 145 column 57: non SGML character number 146.
Italiana Amici della Scimitarra”. L’A.I.A.D.S. ✉

Error Line 147 column 65: non SGML character number 146.
... una signora di 51 anni, fu diagnosticata un��anomalia genetica ✉

Error Line 148 column 36: non SGML character number 147.
rara chiamata ��Sindrome della Scimitarra” o Ritorno Veno✉

Error Line 148 column 62: non SGML character number 148.
... rara chiamata “Sindrome della Scimitarra” o Ritorno Venoso ✉

Error Line 158 column 23: non SGML character number 146.
L��A.I.A.D.S
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Error Line 164 column 75: non SGML character number 146.
...noscenza, a 50 anni, di essere nata con un��anomalia ✉

Error Line 171 column 47: non SGML character number 146.
ma, più capivano, e più l’angoscia aumentava perché non ✉

Error Line 172 column 23: non SGML character number 146.
c��erano punti di riferimento né altri malati con i qua..✉

Error Line 187 column 36: non SGML character number 146.
e Rita è quell’1 che è rimasto vivo anche senza essere ✉

Error Line 188 column 25: non SGML character number 146.
all��epoca, sottoposta ad alcun intervento chirurgico perc✉

Error Line 189 column 35: non SGML character number 133.
probabilmente��
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Error Line 194 column 22: non SGML character number 147.
��Perché di tutto ciò?”
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Error Line 194 column 43: non SGML character number 148.
“Perché di tutto ci��?”
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Error Line 196 column 37: non SGML character number 146.
e la risposta l��ha trovata… creando questa Associazione.✉

Error Line 196 column 48: non SGML character number 133.
e la risposta l’ha trovata… creando questa Associazione.
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Error Line 198 column 23: non SGML character number 146.
L��A.I.A.D.S. [/b]è soggetto ONLUS.
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Warning Line 208 column 116: cannot generate system identifier for general entity "idlista".
...it/html/subscribe.asp?idutente=22321&idlista=14098"></SCRIPT>An entity reference was found in the document, but there is no reference by that name defined. Often this is caused by misspelling the reference name, unencoded ampersands, or by leaving off the trailing semicolon (. The most common cause of this error is unencoded ampersands in URLs as described by the WDG in "Ampersands in URLs".

Entity references start with an ampersand (&) and end with a semicolon (. If you want to use a literal ampersand in your document you must encode it as "&amp;" (even inside URLs!). Be careful to end entity references with a semicolon or your entity reference may get interpreted in connection with the following text. Also keep in mind that named entity references are case-sensitive; &Aelig; and &aelig; are different characters.

If this error appears in some markup generated by PHP's session handling code, this article has explanations and solutions to your problem.

Note that in most documents, errors related to entity references will trigger up to 5 separate messages from the Validator. Usually these will all disappear when the original problem is fixed.

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Error Line 208 column 116: general entity "idlista" not defined and no default entity.
...it/html/subscribe.asp?idutente=22321&idlista=14098"></SCRIPT>This is usually a cascading error caused by a an undefined entity reference or use of an unencoded ampersand (&) in an URL or body text. See the previous message for further details.

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Error Line 208 column 123: reference to entity "idlista" for which no system identifier could be generated.
.../subscribe.asp?idutente=22321&idlista=14098"></SCRIPT>This is usually a cascading error caused by a an undefined entity reference or use of an unencoded ampersand (&) in an URL or body text. See the previous message for further details.

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Info Line 208 column 115: entity was defined here.
....it/html/subscribe.asp?idutente=22321&idlista=14098"></SCRIPT>Error Line 208 column 130: required attribute "TYPE" not specified.
...ibe.asp?idutente=22321&idlista=14098"></SCRIPT>✉

Error Line 212 column 125: reference to entity "idlista" for which no system identifier could be generated.
...nsubscribe.asp?idutente=22321&idlista=14098"></SCRIPT>✉

Info Line 208 column 115: entity was defined here.
....it/html/subscribe.asp?idutente=22321&idlista=14098"></SCRIPT>Error Line 212 column 132: required attribute "TYPE" not specified.
...ibe.asp?idutente=22321&idlista=14098"></SCRIPT>✉

Error Line 214 column 104: reference to entity "idlista" for which no system identifier could be generated.
.../arretrati.asp?idutente=22321&idlista=14098" target="_blank">Arretrati della ✉

Info Line 208 column 115: entity was defined here.
....it/html/subscribe.asp?idutente=22321&idlista=14098"></SCRIPT>Error Line 248 column 89: there is no attribute "BORDERCOLOR".
...ding="0" cellspacing="0" bordercolor="#A3A3D1" id="banner">✉

Error Line 258 column 120: required attribute "ALT" not specified.
...if" width="68" height="50" border="0"></a></div></td>✉

Error Line 262 column 140: required attribute "ALT" not specified.
...ghilterra.gif" width="62" height="46"></a></p>✉