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<html lang="ja"> <meta charset="utf-8"> <script> document.write(Math.random()); document.write("<hr>"); document.write(Math.random()); document.write("<hr>"); document.write(Math.random()); document.write("<hr>"); document.write(Math.random()); document.write("<hr>"); document.write(Math.random()); document.write("<hr>"); document.write(Math.random()); document.write("<hr>"); document.write(Math.random()); document.write("<hr>"); document.write(Math.random()); document.write("<hr>"); document.write(Math.random()); </script> <hr> <p style="color:green;margin:20px;">Math.random() は JavaScript の組み込みメソッド</p> </html>
