Object.extend

[Renato Bebić]

/**
 * Extends object with another objects properties.
 * Author: John Resigs <jeresig[at]gmail.com>
 * Modified by: Renato Bebić <renato.bebic[at]gmail.com>
 * Modified to distinct prototyped properties and extend
 * them to hosts prototype.
 * Tested and works on: Firefox 3.5, Chrome 3, Safari 4 
 *
 * @param object to extend with
 */
Object.prototype.extend = function( object ) {
	var property, getter, setter, target;
	for ( property in object ) {
		getter = object.__lookupGetter__( property );
		setter = object.__lookupSetter__( property );
		target = object.hasOwnProperty( property ) ? this : this.__proto__;
		if ( getter )
			target.__defineGetter__( property, getter );
		else if ( setter )
			target.__defineSetter__( property, setter );
		else
			target[ property ] = object[ property ];
	}
};