<!DOCTYPE html> <!-- Any copyright is dedicated to the Public Domain. - http://creativecommons.org/publicdomain/zero/1.0/ --> <html> <body> <details> <summary style="float:left;">Summary 2</summary> <summary>Summary 1</summary> <p>This is the details 1.</p> </details> <details> <p>This is the details 2.</p> </details> </body> </html>