マウスオーバーしているときに画像をどんどんチェンジするやつ〜う

JavaScript 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<meta http-equiv="Content-Script-Type" content="application/javascript">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>TEST</title>
<body>

<div>
  <img src="./img/0.gif" alt="aaaa" id="my" >
  <a href="#" id="map7" onMouseover="image0.start(1)" onMouseout="image0.stop(0)">TEST</a><br>
  <input type="text" id="v" size="80">
</div>

<script type="text/javascript"><!--

var ToggleImage = function () {
  this.init.apply( this, arguments );
};

ToggleImage.prototype.init = function ( id, wait ) {
  this.e = document.getElementById( id );
  this.w = wait;
  this.g = [ ];
  this.c = 0;
  this.t = null;
  var cnt, obj;

  for( cnt = 0; obj = arguments[ cnt + 2 ]; cnt++ ) {
    this.g[ cnt ] = new Image();
    this.g[ cnt ].src = obj;
  }
  return this.max = cnt - 1;
};


ToggleImage.prototype.start = function ( n ) {
  if( 'undefined' !== typeof n ) this.c = n;
  this.next( this.c );
  if( this.t ) this.stop( );
  return this.t = setInterval( 
    (function( that ) {
      return function () { that.next(); };
    })( this ), this.w );
};


ToggleImage.prototype.next = function ( n ) {
  this.c = ( 'undefined' === typeof n ) ? this.c + 1: n;
  if( this.c > this.max ) this.c = 0;
  return this.e.setAttribute('src', this.g[ this.c ].src);
//this.e.src=this.g[ this.c ].src;
};


ToggleImage.prototype.stop = function ( n ) {
  clearInterval( this.t );
  if( 'undefined' !== typeof n ) this.next( n );
  return this.t = null;
};

var image0 = new ToggleImage( 'my', 300, './img/0.gif', './img/1.gif', './img/2.gif' );

//ぜんかくくうはくは、はんかくにでもなおしてね。
//-->
</script>

追記
さらにコンパクトに！てへぇっ！

var ToggleImage = function(d,w){
  var c=0,t,o,m=0,g=[];while(o=arguments[2+m])(g[m++]=new Image).src=o;
  this.start = function(n){h(n)||(c=n),this.stop(c),t=setInterval((function(_){return function(){_.next()}})(this),w)};
  this.next = function(n){c=h(n)?c+1:n,document.getElementById(d).setAttribute('src',g[c*=c<m].src)};
  this.stop = function (n){h(n)||this.next(n);t&&clearInterval(t),t=0};
  function h(n){return'undefined'===typeof n}
};