function Elastic () {
	
}

Class(Elastic);

Elastic.easeIn = function (t, b, c, d, a, p) {
	if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
	if (!a || a < Math.abs(c)) { a=c; var s=p/4; }
	else var s = p/(2*Math.PI) * Math.asin (c/a);
	return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
}

Elastic.easeOut = function (t, b, c, d, a, p) {
	if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
	if (!a || a < Math.abs(c)) { a=c; var s=p/4; }
	else var s = p/(2*Math.PI) * Math.asin (c/a);
	return (a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b);
}

Elastic.easeInOut = function (t, b, c, d, a, p) {
	if (t==0) return b;  if ((t/=d/2)==2) return b+c;  if (!p) p=d*(.3*1.5);
	if (!a || a < Math.abs(c)) { a=c; var s=p/4; }
	else var s = p/(2*Math.PI) * Math.asin (c/a);
	if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
	return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
}