切换布局
显示结果
<html> <head> <script type = "text/javascript"> <!-- function sayHello() { alert("Hello World") } //--> </script> </head> <body> <script type = "text/javascript"> <!-- document.write("Hello World") //--> </script> <input type = "button" onclick = "sayHello()" value = "向世界打招呼" /> </body> </html>
