<html> <body> <script type="text/javascript"> function employee(name,job,born) { this.name=name; this.job=job; this.born=born; } var bill=new employee("Bill Gates","Engineer",1985); employee.prototype.salary=null; bill.salary=20000; document.write(bill.salary); </script> </body> </html>
结果:
编辑上面的代码，点击查看结果。
yige.org
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