function wheel(event) {
    var delta = 0;
    if (!event) event = window.event;
    if (event.wheelDelta) {
	delta = event.wheelDelta/120; 
	if (window.opera) delta = -delta;
    } else if (event.detail) {
	delta = -event.detail/3;
    }
    if (delta) getMovieName("Cleanprint").handleMouseWheel(delta);
}
if (window.addEventListener)
    window.addEventListener('DOMMouseScroll', wheel, false);
window.onmousewheel = document.onmousewheel = wheel;

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