var isScroll = false;

function wheel(event){
	var delta = 0;
	if (!event) event = window.event;
	if (event.wheelDelta) {
		delta = event.wheelDelta/40; 
		if (window.opera) delta = -delta;
	} else if (event.detail) {
		delta = -event.detail;
	}
	if (delta && isScroll) swfName("main").getScroll(delta);
}

if (window.addEventListener)
	window.addEventListener('DOMMouseScroll', wheel, false);
window.onmousewheel = document.onmousewheel = wheel;

function swfName(str) {
	if (navigator.appName.indexOf("Microsoft") != -1) {
		return window[str]
	}else {
    return document[str]
	}
}

function checkExternalInterface(flag) {
	isScroll = flag;
}