Team:Grenoble/script

    this.elem=c||o.body;

    this.to=a!==undefined?a:1;

    var e=this.elem.style;

    this.from=(b===undefined?(!e.opacity&&e.opacity!==0?(this.to>0?0:1):parseFloat(e.opacity)):b);

    d=d||{};

    this.duration=d.duration||500;

    this.frameRate=d.frameRate||30;

    this.onFinish=d.onFinish;

    this.totalFrames=Math.ceil(this.duration/1000*this.frameRate);

    this.perFrame=(this.to-this.from)/this.totalFrames;

    this.frameNb=0;var f=this;