/**
 * SWFMacMouseWheel v2.0: Mac Mouse Wheel functionality in flash - http://blog.pixelbreaker.com/
 *
 * SWFMacMouseWheel is (c) 2007 Gabriel Bucknall and is released under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 *
 * Dependencies: 
 * SWFObject v2.0 rc1 <http://code.google.com/p/swfobject/>
 * Copyright (c) 2007 Geoff Stearns, Michael Williams, and Bobby van der Sluis
 * This software is released under the MIT License <http://www.opensource.org/licenses/mit-license.php>
 */
var swfmacmousewheel = function()
{
        if( !swfobject ) return null;
        
        var u = navigator.userAgent.toLowerCase();
        var p = navigator.platform.toLowerCase();
        var mac = p ? /mac/.test(p) : /mac/.test(u);
        
        if ( !mac ) return {
            registerObject: function () {}
        };


        var regObjArr = [];
        
        var deltaFilter = function(event)
        {
                var delta = 0;
        if (event.wheelDelta) {
                        delta = event.wheelDelta/120;
                        if (window.opera) delta = -delta;
        } else if (event.detail) {
            delta = -event.detail;
        }
        if (event.preventDefault) event.preventDefault();
                return delta;
        }
        
        var deltaDispatcher = function(event)
        {
                var delta = deltaFilter(event);
                var obj;
                for(var i=0; i<regObjArr.length; i++ )
                {
                        obj = swfobject.getObjectById(regObjArr[i]);
                        if( typeof( obj.externalMouseEvent ) == 'function' ) obj.externalMouseEvent( delta );
                }
        }
        
        if (window.addEventListener) window.addEventListener('DOMMouseScroll', deltaDispatcher, false);
        window.onmousewheel = document.onmousewheel = deltaDispatcher;
                        
        return {
                /*
                Public API
                */
                registerObject: function(objectIdStr)
                {
                        regObjArr[regObjArr.length] = objectIdStr;
                }
        };
}();