切换布局
显示结果
<html> <head> <script type = "text/javascript"> <!-- function Warn() { alert ("This is a warning message!"); } //--> </script> </head> <body> <form> <p>点击下面的按钮查看结果： </p> <input type = "button" value = "Click Me" onclick = "Warn();" /> </form> </body> </html>
