<html><head><style type="text/css">p{ text-align: right;}</style><script type="text/javascript">function changeMargin(){document.getElementById("p1").style.marginRight="32px";}</script></head><body><input type="button" onclick="changeMargin()" value="Change the right margin of a paragraph" /><p>This is a paragraph</p><p id="p1">This is a paragraph</p><p>This is a paragraph</p></body></html>