monsieuroeuf

// Ease and Wizz 2.0.2 : inOutBack : All keyframes
// Ian Haigh (http://ianhaigh.com/easeandwizz/)
// Last built: 2012-09-26T16:53:49+10:00
// some defaults
var p = 0.8;		// period for elastic
var a = 50;		// amplitude for elastic
var s = 1.70158;	// overshoot amount for "back"
function easeandwizz_inOutBack(t, b, c, d) {
		if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
		return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;