From http://www.w3schools.com (Copyright Refsnes Data)

JavaScript prototype Property

Array Object Reference

JavaScript Array Object

Definition and Usage

The prototype property allows you to add properties and methods to an object.

Syntax

object.prototype.name=value

Example

Example

In this example we will show how to use the prototype property to add a property to an object:

<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:

20000

Try it yourself »

Array Object Reference

JavaScript Array Object

From http://www.w3schools.com (Copyright Refsnes Data)