There's no software that will fix validation errors for you, although
HTML Tidy may be of some help.
Just read the error messages from the validator. They tell you exactly what is wrong.
The first one is an extraneous(?)
</table> tag on line 238. It's hard to see what's wrong, because of the soup of nested table tags. You need to look closely at your markup and make sure each
<table> tag is matched by exactly one
</table> tag.
Then you have some attribute values without quotation marks.
All attribute values must be quoted in XHTML. From the looks of it, you should use HTML 4.01 instead. If not, you need to read up on what XHTML is.
You're missing the self-closing syntax of some IMG element (should be
<img.../>). You're also missing the required
alt attribute for images.
Then you have lots of unescaped ampersands in link URIs. They need to be changed into '
&'.
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