'; } } function Accelimation(from, to, time, zip) { if (typeof zip == "undefined") zip = 0; if (typeof unit == "undefined") unit = "px"; this.x0 = from; this.x1 = to; this.dt = time; this.zip = -zip; this.unit = unit; this.timer = null; this.onend = new Function(); this.onframe = new Function(); } Accelimation.prototype.start = function() { this.t0 = new Date().getTime(); this.t1 = this.t0 + this.dt; var dx = this.x1 - this.x0; this.c1 = this.x0 + ((1 + this.zip) * dx / 3); this.c2 = this.x0 + ((2 + this.zip) * dx / 3); Accelimation._add(this); } Accelimation.prototype.stop = function() { Accelimation._remove(this); } Accelimation.prototype._paint = function(time) { if (time < this.t1) { var elapsed = time - this.t0; this.onframe(Accelimation._getBezier(elapsed/this.dt,this.x0,this.x1,this.c1,this.c2)); } else this._end(); } Accelimation.prototype._end = function() { Accelimation._remove(this); this.onframe(this.x1); this.onend(); } Accelimation._add = function(o) { var index = this.instances.length; this.instances[index] = o; if (this.instances.length == 1) { this.timerID = window.setInterval("Accelimation._paintAll()", this.targetRes); } } Accelimation._remove = function(o) { for (var i = 0; i < this.instances.length; i++) { if (o == this.instances[i]) { this.instances = this.instances.slice(0,i).concat( this.instances.slice(i+1) ); break; } } if (this.instances.length == 0) { window.clearInterval(this.timerID); this.timerID = null; } } Accelimation._paintAll = function() { var now = new Date().getTime(); for (var i = 0; i < this.instances.length; i++) { this.instances[i]._paint(now); } } Accelimation._B1 = function(t) { return t*t*t } Accelimation._B2 = function(t) { return 3*t*t*(1-t) } Accelimation._B3 = function(t) { return 3*t*(1-t)*(1-t) } Accelimation._B4 = function(t) { return (1-t)*(1-t)*(1-t) } Accelimation._getBezier = function(percent,startPos,endPos,control1,control2) { return endPos * this._B1(percent) + control2 * this._B2(percent) + control1 * this._B3(percent) + startPos * this._B4(percent); } Accelimation.instances = []; Accelimation.targetRes = 10; Accelimation.timerID = null;

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