9 New Transitions For Scriptaculous

//
// transitions.js
//
// Equations by Robert Penner for Macromedia Flash (http://www.robertpenner.com)
// Adapted for Scriptaculous by Ken Snyder (kendsnyder ~at~ gmail ~dot~ com) June 2006
// Free for private or business use. Crash IE at your own risk.
//

//
// Overshooting Transitions
//

// Elastic (adapted from "EaseOutElastic")
Effect.Transitions.Elastic = function(pos) {
	return -1*Math.pow(4,-8*pos) * Math.sin((pos*6-1)*(2*Math.PI)/2) + 1;
};
// SwingFromTo (adapted from "BackEaseInOut")
Effect.Transitions.SwingFromTo = function(pos) {
	var s = 1.70158;
	if ((pos/=0.5) < 1) return 0.5*(pos*pos*(((s*=(1.525))+1)*pos - s));
	return 0.5*((pos-=2)*pos*(((s*=(1.525))+1)*pos + s) + 2);
};
// SwingFrom (adapted from "BackEaseIn")
Effect.Transitions.SwingFrom = function(pos) {
	var s = 1.70158;
	return pos*pos*((s+1)*pos - s);
};
// SwingTo (adapted from "BackEaseOut")
Effect.Transitions.SwingTo = function(pos) {
	var s = 1.70158;
	return (pos-=1)*pos*((s+1)*pos + s) + 1;
};

//
// Bouncing Transitions
//

// Bounce (adapted from "EaseOutBounce")
Effect.Transitions.Bounce = function(pos) {
	if (pos < (1/2.75)) {
		return (7.5625*pos*pos);
	} else if (pos < (2/2.75)) {
		return (7.5625*(pos-=(1.5/2.75))*pos + .75);
	} else if (pos < (2.5/2.75)) {
		return (7.5625*(pos-=(2.25/2.75))*pos + .9375);
	} else {
		return (7.5625*(pos-=(2.625/2.75))*pos + .984375);
	}
};
// BouncePast (new creation based on "EaseOutBounce")
Effect.Transitions.BouncePast = function(pos) {
	if (pos < (1/2.75)) {
		return (7.5625*pos*pos);
	} else if (pos < (2/2.75)) {
		return 2 - (7.5625*(pos-=(1.5/2.75))*pos + .75);
	} else if (pos < (2.5/2.75)) {
		return 2 - (7.5625*(pos-=(2.25/2.75))*pos + .9375);
	} else {
		return 2 - (7.5625*(pos-=(2.625/2.75))*pos + .984375);
	}
};

//
// Gradual Transitions
//

// EaseFromTo (adapted from "Quart.EaseInOut")
Effect.Transitions.EaseFromTo = function(pos) {
	return -0.5 * ((pos-=2)*pos*pos*pos - 2);
};
// EaseFrom (adapted from "Quart.EaseIn")
Effect.Transitions.EaseFrom = function(pos) {
	return Math.pow(pos,4);
};
// EaseTo (adapted from "Quart.EaseOut")
Effect.Transitions.EaseTo = function(pos) {
	return (pos-1)*pos*pos*pos - 1;
};