background: -moz-linear-gradient(center bottom , #303030, #3A3A3A) repeat scroll 0 0 transparent;
I tried background:-webkit-linear-gradient (center bottom , #303030, #3A3A3A) repeat scroll 0 0 transparent;
for chrome, but it didn’t work. Likewise for IE, I tried ms-linear-gradient with the same values, it it didn’t work as well.
There is an excellent tool available for generating css for gradients here:
http://www.colorzilla.com/gradient-editor/
For other css3 you can use:
http://www.css3generator.com/