W3School TIY Editor
W3School 在线教程
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<html> <body> <script type="text/javascript"> var str="Welcome to Microsoft! "; str=str + "We are proud to announce that Microsoft has "; str=str + "one of the largest Web Developers sites in the world."; document.write(str.replace(/Microsoft/g, "W3School")); </script> </body> </html>