<!DOCTYPE html> <html> <head> <style> span { color: red } :default + span { color: green } span.reverse { color: green } :default + span.reverse { color: red } input { display: none } </style> </head> <body onload="document.getElementById('foo').type = 'submit'"> <form> <input id="foo"><span>This should be green</span> <input type="image"><span class="reverse">This should be green</span> </form> </body> </html>