simple-oop-example.js

$(document).ready( function( ) {

var extendedLogger = function( ) {
    //
    this.many = ['console', 'alert', 'print'];
    //  
    this.logMultiple = function ( msg ) {
        var i=0, many= this.many, n=many.length;
        for (; i<n; i++) {
            this.logMany( msg, many[i] );
        }
    }
    // 
    this.logMany = function ( msg, type ) {
        type = type.toLowerCase();
        switch( type ) {
            case 'print':
                document.open( );
                document.write( msg );
                document.close( );
                break;
            case 'alert':
                alert( msg );
                break;
            default:
                console.log( msg );       
        }
    }
}



extendedLogger.prototype = new Logger( ); 
var logger = new extendedLogger( );
logger.setType( 'example' );
logger.logMultiple( logger.getType( ) );


});


var Logger = function( ) {
    //
    this.type = '';
    //
    this.setType = function( type ) {
        this.type = type.toLowerCase();
    }
    //
    this.getType = function ( ) {
        return this.type;
    }
    //
    this.log = function ( msg ) {
        switch( this.type ) {
            case 'print':
                document.open( );
                document.write( msg );
                document.close( );
                break;
            case 'alert':
                alert( msg );
                break;
            default:
                console.log( msg );       
        }
    }
}