Parallax

Hi,
how can I add parallax background?

thanks

Read this
demo.joomlaplates.com/jp_simple/theme-fe.../section-backgrounds
or this
www.joomlaplates.com/support/documentation/warp-7-backgrounds

Hi,
in your link I can't find nothing about the parallax effect but I found in W3 school this code that seemes work

#top-d{

background-attachment: fixed !important;
background-position: center !important;
background-repeat: no-repeat !important;
background-size: cover !important;

}
It's correct?
Another thing, in this position I've set up an animation but not working

Here the link

thanks
lcoinformatica.it/mediamover2/