Definition and Usage
定义与用法

The prototype property allows you to add properties and methods to an object.
prototype属性可为对象添加属性和方法

Syntax
语法

object.prototype.name=value

Example 1
举例 1

In this example we will show how to use the prototype property to add a property to an object:
在这个举例中我们将展示如何使用 prototype属性来为对象添加属性

<script type="text/javascript">

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>

The output of the code above will be:
输出结果为：

20000

Try-It-Yourself Demos
尝试与演示

prototype
In this example we will show how to use the prototype property.
怎样使用 prototype属性

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