Animation duration : Easing equation :

function init(){
	empty_mc = document.getElementById('empty');
	dummy_mc = document.getElementById('dummy');
	empty_mc.onclick = moveSquare;
	zz = new Tween(dummy_mc.style,'left','',parseInt(dummy_mc.style.left),10,1,'px');
	zzz = new Tween(dummy_mc.style,'top','',parseInt(dummy_mc.style.top),10,1,'px');
}
function moveSquare(evt){
		if(!evt) evt = window.event;
		var x = evt.offsetX || evt.layerX;
		var y = evt.offsetY || evt.layerY;
		var duration = document.getElementById('myDuration').value;
		var easingFunc = eval(document.getElementById('easingSelect').value);
		isNaN(duration) ? duration = 1 : null;
		zz.func = easingFunc;
		zz.continueTo(x,duration);
		zzz.func = easingFunc;
		zzz.continueTo(y,duration);
		
}