x
<html><head><style>body { font-size: 100%;}h1 { font-size: 2.5em;}h2 { font-size: 1.875em;}p { font-size: 0.875em;}</style></head><body><h1>This is heading 1</h1><h2>This is heading 2</h2><p>This is a paragraph.</p><p>Specifying the font-size in percent and em displays the same size in all major browsers, and allows all browsers to resize the text!</p></body></html>