Marc about the use of the alt attribute read my post here. If you follow those instructions, you will be safe:
http://www.webproworld.com/viewtopic.php?t=70255
About
line 32, you are trying to define a background color in a row. Take that out and just have there <tr>.
If you see any color changes on your page, let me know what and where and we can fix that in a second. :)