#one {

z-index: 1;

}

#two {

z-index: 2;

}

As you can see, because of the higher value, the second div showed up on top of the pile.

There are no restrictions on what number you use for your rule – it’s completely up to you. However, there is actually a max number that browsers will support, which is, very specifically 2147483647. So, you know, try to avoid numbers that high …

Fixed

This one is a lot of fun and once again incredibly useful. Fixed positioning sets the element relative to the viewport.