DataTable Header columns lines separators

magolla

Hi!

(Sorry for my bad english)

I have this datatable header:

http://imgur.com/8A9HQon

and want take of the lines between each column and get this:

http://imgur.com/wAq8tDJ

I want modify this in Css files but cant figure how do it,maybe need change some in the .Js but i dont have much knowledge about .js

Anyone can give me a hand?

Thanks you!