[VE][108] Error Message Feedback

Hello,

I used your validation program to see how my site was, and I gave me a couple of incorrect errors.  For example, it said:

Line 19, column 124: there is no attribute "MARGINHEIGHT"

....0000FF" vlink="#800080" marginheight="0" marginwidth="1" topmargin="0" leftma...

And you can see it in the line above.  Do I have to capitalize the marginheight or put quotes around it?  It also did this for
marginwidth, topmargin, leftmargin, hspace, vspace, and height.
I also was wondering what the "ALT" attribute was- it gave me MANY errors because I didn't have it.

Thanks,
Eric