<!DOCTYPE html> <html> <head> <title>Test inheritance through fieldsets and legends</title> <style> /** * The idea is that "color" inherits by default while "border-color" does * not. So if the former is red and the latter is green on a parent, and * the child's border-color is set to "inherit", it'll be green only if * the child is inheriting from the parent. If not, it'll either be * whatever the border-color is on what it's inheriting from, which will * be red if what it's inheriting from has the default (currentColor) * border-color). */ /* 't' for "test" */ * { color: red; border: 0px hidden red; background: transparent } .t { border-color: green } .t > :first-child { border-color: inherit; border-style: solid; border-width: 10px } </style> <script> function make(str) { return document.createElement(str); } window.onload = function() { document.getElementById("f").appendChild(make("div")); document.getElementById("l").appendChild(make("span")); } </script> </head> <body> <fieldset class="t"><div></div></fieldset> <fieldset><legend class="t"><span></span></legend></fieldset> <fieldset class="t" id="f"></fieldset> <fieldset><legend class="t" id="l"></legend></fieldset> </body> </html>