Adding method to a class using prototype : Member Function « Object Oriented « JavaScript Tutorial

JavaScript Tutorial
1. Language Basics
2. Operators
3. Statement
4. Development
5. Number Data Type
6. String
7. Function
8. Global
9. Math
10. Form
11. Array
12. Date
13. Dialogs
14. Document
15. Event
16. Location
17. Navigator
18. Screen
19. Window
20. History
21. HTML Tags
22. Style
23. DOM Node
24. Drag Drop
25. Object Oriented
26. Regular Expressions
27. XML
28. GUI Components
29. Dojo toolkit
30. jQuery
31. Animation
32. MS JScript
Java
Java Tutorial
Java Source Code / Java Documentation
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
JavaScript Tutorial » Object Oriented » Member Function 
25. 4. 4. Adding method to a class using prototype
<HTML>
<HEAD>
<TITLE>Instance method demo</TITLE>
</HEAD>
   <BODY>
   <H1>
   <SCRIPT>
   // constructor function
   function Rectangle(height, width){
      this.height =  height;
      this.width = width;
   }
  
   function getArea () {
      return this.height * this.width;
   }
   // turn the function into an object method
   Rectangle.prototype.calcArea = getArea;

   var theRectangle = new Rectangle (35);
   theRectangle.width = 10;

   document.write("The rectangle instance height is: " + theRectangle.height + "<br>");
   document.write("The rectangle instance width is: " + theRectangle.width  + "<br>");
   document.write ("The calcArea method returns: " + theRectangle.calcArea());
   </SCRIPT>
   </H1>
   </BODY>
</HTML>
25. 4. Member Function
25. 4. 1. Defining the object methods outside of the factory functions and then pointing to them
25. 4. 2. Create an Object with member method
25. 4. 3. Add member function
25. 4. 4. Adding method to a class using prototype
25. 4. 5. Custom objects and associative object arrays
25. 4. 6. Instance method
25. 4. 7. Call object member function
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.