W3C Validation - how important is it?

[MattF]

Your first problem is here:

Code:

<tr><td class="trow1"><img src="http://www.leefish.nl/SiteImages/bookmarksite.jpg" alt="books" /></td></tr> </tr>

---

You have two closing row tags, </tr>.

When validating, start with the uppermost errors on the page, as you'll usually find that several problems listed further down may be phantom errors induced by the earliest error on the page. As to why validation is important:

1) Correct rendering in all browsers. Get the code valid and you know that all browsers will render it as they should and also more quickly, as they aren't trying to guess how the page should look, i.e: quirks mode rendering.

2) Accessibility. A valid page, with alt tags, title tags etc is more accessible.

3) It's good form, and there is no valid reason not to generate valid output.