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<!DOCTYPE html> <html> <body> <h2>JavaScript 函数</h2> <p>在此示例中， myFunction 是一个函数构造函数：</p> <p id="demo"></p> <script> function myFunction(arg1, arg2) { this.firstName = arg1; this.lastName = arg2; } var x = new myFunction("John","Doe") document.getElementById("demo").innerHTML = x.firstName; </script> </body> </html>