FCKEditor not XHTML Strict valid | align is not allowed.

Hello,

i build a drupal website and use the fckeditor. I tested my website with the html validator from http://www.w3c.org. There are 2 Errors i get because of the FCKEditor. When i insert a image on the right side of the text the fckeditor post the following code:

<img width="800" height="600" align="right" src="/image.jpg" alt="" />

correct is the following:

<img width="800" height="600" style="float:right;" src="/image.jpg" alt="here must be a text" />

Is it possible to check if an "alt"-text is written, like in the tinymce editor and to change the way the editor set the text-float around a picture?

thanks

strauch

p.s. there is another nice feature in the tinymce editor, it warns if i leave the site without saving.