possible to use css to have zebra stripe as background without using image?
Yes you can, with something like
ul li {
background-color: #fff;
}
ul li:nth-child(even) {
background-color: #efefef;
}
See:
http://reference.sitepoint.com/css/pseudoclass-nthchild
http://reference.sitepoint.com/css/understandingnthchildexpressions
Edit
You really should've stated clearly what you meant by zebra strips ;)
If you need gradient backgrounds without using images, see:
http://www.webdesignerwall.com/tutorials/cross-browser-css-gradient/
Basically, the syntax you'll be using will look something like:
background-image: -moz-linear-gradient(left, #fff, #999);
background-image: -webkit-gradient(linear, #fff, #999);
See:
https://developer.mozilla.org/en/CSS/-moz-linear-gradient
http://webkit.org/blog/175/introducing-css-gradients/
For more details
Not really in the context I think you are referring to. You can use CSS3 selectors to target alternating items.
ul li {
background-color:#000;
}
ul li:nth-child(odd) {
background-color:#FFF;
}
Even though you stated no image, the best solution would be to use a 1 pixel wide image with 2 rows that you repeat across x and y axis.
It's a little hard to understand what you're after, but I would suggest maybe looking into Base64 encoded images in css
http://stackoverflow.com/questions/35879/base64-encoding-image
or alternatively using canvas or the svg namespace to draw it yourself