/**
 * 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;
	}
};

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