var _wheelEnabled = true;
function wheelEnabled(flg){
  _wheelEnabled = flg;
}
function wheel(event){
	if(!_wheelEnabled){
		if(!event){
			event = window.event;
		}
		if(event.preventDefault){
			event.preventDefault();
		}
		event.returnValue = false;
	}
}
if(window.addEventListener){
	window.addEventListener('DOMMouseScroll', wheel, false);
}
window.onmousewheel = document.onmousewheel = wheel;