How to do a CSS table

[Cern]

I want to know how to do a css table with DIVS and to make the rows even/odd with diferent colors. the data columns must to be static or go with the content if this exceed the space on one row.the rows are autogenerated by a for in php who get data out from a db. The HTML table is not suitable because is not SEO friendlly. data from this table is very important and i want it to get indexed very well.i also wanna know how to do a pop up with a captcha when a page is displayed like those javascript alerts and if this kind of practice is good for SEO and indexing contentThankstable code for picture http://i46.tinypic.com/et8vuv.jpg\[code\] if (count($results1)) { echo "CURSURI:"; echo "<div id='curs'><ul>"; echo "<li><ui>Nume</ui><ui> Uploader</ui><ui>Tip</ui><ui>Data</ui> </li>";foreach($results1 as $x) { echo "<li><ui>". $i++.". <a href='".$x->link."'>". $x->name. "</a></ui> <ui>".$x->user."</ui><ui>".$x->ext."</ui><ui>".$x->date."</ui> </li>";}echo "</ul></div>";} \[/code\]