W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<html> <head> <script type="text/javascript"> function setHeight() { document.getElementById("b1").style.height="50px"; } </script> </head> <body> <input type="button" id="b1" onclick="setHeight()" value="Change height of button to 50 px" /> </body> </html>