/**
 * SWFMacMouseWheel v1.0: Mac Mouse Wheel functionality in flash - http://blog.pixelbreaker.com/
 *
 * SWFMacMouseWheel is (c) 2006 Gabriel Bucknall and is released under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 *
 * Dependencies: 
 * SWFObject v2.0 - (c) 2006 Geoff Stearns.
 * http://blog.deconcept.com/swfobject/
 */
function SWFMacMouseWheel( swfObject )
{
	this.so = swfObject;
	var isMac = navigator.appVersion.toLowerCase().indexOf( "mac" ) != -1;
	if( isMac ) this.init();
	else
		hookMouseWheel();


}

function hookMouseWheel()
{
    if (window.addEventListener)
        window.addEventListener('DOMMouseScroll', onMouseWheel, false);
    window.onmousewheel = document.onmousewheel = onMouseWheel;
}

function onMouseWheel(event)
{
	//return cancelEvent(event);
    var delta = 0;
    if (!event)
        event = window.event;
    if (event.wheelDelta) {
        delta = event.wheelDelta/120*3;
        if (window.opera) delta = -delta;
    } else if (event.detail) {
        delta = -event.detail/3;
    }

    if (isOverSwf(event)) {
        return cancelEvent(event);
    }

    return true;
}

function isOverSwf(mEvent)
{
    var elem;
    if (mEvent.srcElement) {
        elem = mEvent.srcElement.nodeName;
    } else if (mEvent.target) {
        elem = mEvent.target.nodeName;
    }

    if (elem.toLowerCase() == "object" || elem.toLowerCase() == "embed") {
        return true;
    }
    return false;
}


function cancelEvent(e)
{
    e = e ? e : window.event;
    if (e.stopPropagation)
        e.stopPropagation();
    if (e.preventDefault)
        e.preventDefault();
    e.cancelBubble = true;
    e.cancel = true;
    e.returnValue = false;
    return false;
}


SWFMacMouseWheel.prototype = {
	init: function()
	{
		SWFMacMouseWheel.instance = this;
		if (window.addEventListener)
		{
	        window.addEventListener('DOMMouseScroll', SWFMacMouseWheel.instance.wheel, false);
		}
		window.onmousewheel = document.onmousewheel = SWFMacMouseWheel.instance.wheel;
	},
	
	handle: function( delta )
	{
		document[ this.so.getAttribute('id') ].externalMouseEvent( delta );
	},

	wheel: function(event){
        var delta = 0;
        if (event.wheelDelta) { /* IE/Opera. */
			delta = event.wheelDelta/120*3;
			if (window.opera) delta = -delta;
        } else if (event.detail) { /** Mozilla case. */
			alert("Mozilla." + event.detail);
            delta = -event.detail/3;
        }
        if( /AppleWebKit/.test(navigator.userAgent) ) {
        	delta /= 3;	
        }
        /** If delta is nonzero, handle it.
         * Basically, delta is now positive if wheel was scrolled up,
         * and negative, if wheel was scrolled down.
         */
        if (delta) {
               SWFMacMouseWheel.instance.handle(delta);
		}
        /** Prevent default actions caused by mouse wheel.
         * That might be ugly, but we handle scrolls somehow
         * anyway, so don't bother here..
         */
        if (event.preventDefault) event.preventDefault();
		event.returnValue = false;
	}
};