validating xhtml and css with w3c

I'm trying to make my pages full compilant with xhtml 1.0 (strict) and css and I'm using w3c validators to check for errors, I solved most of the errors, but there are some I can't solve, first of all, I have a script tag in the head tag and I get the error:
<script type="text/javascript" language="JavaScript">
Error: there is no attribute "language" for this element (in this HTML version)
how should I write this tag without the language elemnt ? just the type ? is that enogh ?

And I have some other errors, are this error because this properties should be seted up with css ?

<td width="160" align="left" valign="top" class="menu">
Error: there is no attribute "width" for this element (in this HTML version)

... php?page=home"><img src="images/homed.gif" border="0" width="144" heig ...
Error: there is no attribute "border" for this element (in this HTML version)

... omed.gif" border="0" width="144" height="34" name="home" alt="Home" on ...
Error: there is no attribute "name" for this element (in this HTML version)

... ight="31" border="0" alt="SourceForge Logo" align="right" />
Error: there is no attribute "align" for this element (in this HTML version)

And when checking my css I've get this error and I don't really understand it, could you help me ?
Error
Target: http://209.99.230.188/ASAPlate/web/ org.xml.sax.SAXException: Please, fix your system identifier (URI) in the DOCTYPE rule.
Thank you.

In HTML 4.01, the language attribute is deprecated in favour of type. See also
http://www.w3.org/TR/1999/REC-html4...s.html#h-18.2.1

The width attribute of the td tag is deprecated, use CSS.
http://www.w3.org/TR/1999/REC-html4...s.html#h-11.2.6

Quoting from http://www.w3.org/TR/1999/REC-html4...cts.html#visual :


Next two errors: give the complete tags or RTFM yourself.

DOCTYPE: Cf. http://www.w3.org/TR/xhtml1/#docconf , 3.1.1. rule 4, where DOCTYPE samples are given.