Mi lehet ebben a html kódban a hiba?

<p><img src="kezdolap/golden1.jpg" width="220" height="165" /><span style="background-color: none; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-weight: bold;"><br />

Balaton</span></p>

és ezt írja rá a validátor: required attribute "alt" not specified

The attribute given above is required for an element that you've used, but you have omitted it. For instance, in most HTML and XHTML document types the "type" attribute is required on the "script" element and the "alt" attribute is required for the "img" element.

Typical values for type are type="text/css" for <style> and type="text/javascript" for <script>.