How does \[code\]z-index\[/code\] actually work?Does it function on elements with no specified \[code\]position\[/code\]?Does it favor elements (ie. make them on top) that have a specified \[code\]position\[/code\]?Do the numbers have to be negative like this? \[code\]<div style='z-index:-2;'>below</div><div style='z-index:-1;'>less below</div><div style='z-index:0;'>on top</div>\[/code\]? Or not? Would all positive numbers (in increasing value) end up with the last being on the top, the middle in the middle, and the first on the bottom?I'm learning from W3Schools, and their lesson on this is so confusing! 
Thanks a lot in advance!
Thanks a lot in advance!