菜鸟学堂
在线运行
源代码
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟学堂(edu.jb51.net)</title> </head> <body> <script> function employee(name,jobtitle,born){ this.name=name; this.jobtitle=jobtitle; this.born=born; } var fred=new employee("Fred Flintstone","Caveman",1970); employee.prototype.salary=null; fred.salary=20000; document.write(fred.salary); </script> </body> </html>
运行结果
在线运行
菜鸟学堂 edu.jb51.net