/*                                                                                                                                                      

Copyright (c) 2006, Yahoo! Inc. All rights reserved.

Code licensed under the BSD License:

http://developer.yahoo.net/yui/license.txt

version: 0.11.3

*/ 



/**

 * The Yahoo global namespace

 * @constructor

 */

window.YAHOO = window.YAHOO || {};



/**

 * Returns the namespace specified and creates it if it doesn't exist

 *

 * YAHOO.namespace("property.package");

 * YAHOO.namespace("YAHOO.property.package");

 *

 * Either of the above would create YAHOO.property, then

 * YAHOO.property.package

 *

 * Be careful when naming packages. Reserved words may work in some browsers

 * and not others. For instance, the following will fail in Safari:

 *

 * YAHOO.namespace("really.long.nested.namespace");

 *

 * This fails because "long" is a future reserved word in ECMAScript

 *

 * @param  {String} ns The name of the namespace

 * @return {Object}    A reference to the namespace object

 */

YAHOO.namespace = function(ns) {



    if (!ns || !ns.length) {

        return null;

    }



    var levels = ns.split(".");

    var nsobj = YAHOO;



    // YAHOO is implied, so it is ignored if it is included

    for (var i=(levels[0] == "YAHOO") ? 1 : 0; i<levels.length; ++i) {

        nsobj[levels[i]] = nsobj[levels[i]] || {};

        nsobj = nsobj[levels[i]];

    }



    return nsobj;

};



/**

 * Uses YAHOO.widget.Logger to output a log message, if the widget is available.

 *

 * @param  {string}  sMsg       The message to log.

 * @param  {string}  sCategory  The log category for the message.  Default

 *                              categories are "info", "warn", "error", time".

 *                              Custom categories can be used as well. (opt)

 * @param  {string}  sSource    The source of the the message (opt)

 * @return {boolean}            True if the log operation was successful.

 */

YAHOO.log = function(sMsg, sCategory, sSource) {

    var l = YAHOO.widget.Logger;

    if(l && l.log) {

        return l.log(sMsg, sCategory, sSource);

    } else {

        return false;

    }

};



/**

 * Utility to set up the prototype, constructor and superclass properties to

 * support an inheritance strategy that can chain constructors and methods.

 *

 * @param {function} subclass   the object to modify

 * @param {function} superclass the object to inherit

 */

YAHOO.extend = function(subclass, superclass) {

    var f = function() {};

    f.prototype = superclass.prototype;

    subclass.prototype = new f();

    subclass.prototype.constructor = subclass;

    subclass.superclass = superclass.prototype;

    if (superclass.prototype.constructor == Object.prototype.constructor) {

        superclass.prototype.constructor = superclass;

    }

};



YAHOO.namespace("util");

YAHOO.namespace("widget");

YAHOO.namespace("example");