<!DOCTYPE html> <html> <head> <style type="text/css"> #a { height: 4em; background-color: green; overflow: hidden; } #a div{ position: absolute; top: 1em; left: 1em; background-color: lime; height: 7em; width: 7em; } </style> </head> <body> <div id="a"> <div></div> </div> <textarea> FAIL</textarea> </body> </html>