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<!DOCTYPE html> <html> <body> <h1>JavaScript 函数</h1> <p>在这个例子中，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("Bill","Gates") document.getElementById("demo").innerHTML = x.firstName; </script> </body> </html>