/**
 * 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();
}
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;
			if (window.opera) delta = -delta;
	} else if (event.detail) { /** Mozilla case. */
		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;
	}
};