点击运行
<html> <head> <script type="text/javascript"> function changeMargin() { document.getElementById("p1").style.marginTop="32px"; } </script> </head> <body> <input type="button" onclick="changeMargin()" value="Change the top 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>
运行结果
