fmpq.com
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Fmpq教程(fmpq.com)</title> </head> <body> <p id="demo"></p> <script> var y = 1000 / 0; document.getElementById("demo").innerHTML = isNaN(y); </script> </body> </html>
运行结果