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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> </head> <body> <script> function person(firstname,lastname,age,eyecolor){ this.firstname=firstname; this.lastname=lastname; this.age=age; this.eyecolor=eyecolor; } myFather=new person("John","Doe",50,"blue"); document.write(myFather.firstname + " is " + myFather.age + " years old."); </script> </body> </html>