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there is no attribute "onMouseover"

From: Denis Ivanov <denis4o@gmail.com>
Date: Mon, 19 Mar 2007 00:34:40 +0200
Message-ID: <be784e630703181534p38784273q963c031de87a9cb6@mail.gmail.com>
To: "www-validator@w3.org" <www-validator@w3.org>
Hello everybody!
Can you tell me how to fix this error?

Error *Line 22<http://validator.w3.org/check?uri=http%3A%2F%2F83.142.17.227%2F_hosting%2Fupload%2520denis4o%2Fsite%2F&charset=%28detect+automatically%29&doctype=XHTML+1.0+Transitional&ss=1#line-22>,
column 38*: there is no attribute "onMouseover" <td bgcolor="#FFFFFF"
onMouseover=*"*this.style.backgroundColor='#7DD3D3'" onm

 You 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<http://validator.w3.org/docs/help.html#faq-flash>.


The file I'm checking is :
http://83.142.17.227/_hosting/upload%20denis4o/site/
Received on Monday, 19 March 2007 07:11:09 GMT

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