function handle(delta) {
		if (delta < 0) {
			thisMovie("tankaDesign").scrollDown();
		} else {
			thisMovie("tankaDesign").scrollUp();
		}
	}
	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)
			handle(delta);
			if (event.preventDefault)
					event.preventDefault();
			event.returnValue = false;
	}
	
	/* Initialization code. */
	if (window.addEventListener)
		window.addEventListener('DOMMouseScroll', wheel, false);
	window.onmousewheel = document.onmousewheel = wheel;


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