<SCRIPT language="Javascript">

var isNS = (navigator.appName == "Netscape");
layerRef = (isNS) ? "document" : "document.all";
styleRef = (isNS) ? "" : ".style";
var queue = new Array();
var NUM_OF_TRAIL_PARTS = 5

for (x=1; x < 6; x++)
{
  eval("trailSpriteFrame" + x + " = new Image(28,36);");
  eval("trailSpriteFrame" + x + ".src = 'trailgif" + x + ".gif';");
}

function trailSpriteObj(anID)
{
  this.trailSpriteID = "trailSprite" + anID;
  this.imgRef = "trailSprite" + anID + "img";
  this.currentFrame = 1;
  this.animateTrailSprite = animateTrailSprite;
}

function animateTrailSprite()
{
  if (this.currentFrame <6 )
  {
    if (isNS)
    {
      eval("document." + this.trailSpriteID +".document['"+ this.imgRef + "'].src = trailSpriteFrame" + this.currentFrame + ".src");
    }
    else
    {
      eval("document['" + this.imgRef + "'].src = trailSpriteFrame" + this.currentFrame + ".src");
    }
    this.currentFrame ++;
  }
  else
  {
    eval(layerRef + '.' + this.trailSpriteID + styleRef + '.visibility = "hidden"');
  }
}

function processAnim()
{
  for(x=0; x < NUM_OF_TRAIL_PARTS; x++)
    queue[x].animateTrailSprite();
}

function processMouse(e)
{
  currentObj = shuffleQueue();
  if (isNS)
  {
    eval("document." + currentObj + ".left = e.pageX - 10 ;");
    eval("document." + currentObj + ".top = e.pageY + 10;");
  }
  else
  {
    eval("document.all." + currentObj + ".style.pixelLeft = event.clientX + document.body.scrollLeft - 10 ;");
    eval("document.all." + currentObj + ".style.pixelTop = event.clientY + document.body.scrollTop + 10;");
  }
}

function shuffleQueue()
{
  lastItemPos = queue.length - 1;
  lastItem = queue[lastItemPos];
  for (i = lastItemPos; i>0; i--)
    queue[i] = queue[i-1];
  queue[0] = lastItem;
  queue[0].currentFrame = 1;
  eval(layerRef + '.' + queue[0].trailSpriteID + styleRef + '.visibility = "visible"'); return queue[0].trailSpriteID;
}

function init()
{
  for(x=0; x<NUM_OF_TRAIL_PARTS; x++)
    queue[x] = new trailSpriteObj(x+1) ;
  if (isNS)
  {
    document.captureEvents(Event.MOUSEMOVE);
  }
  document.onmousemove = processMouse; setInterval("processAnim();",25);
}

if (document.all || document.layers)
window.onload = init;

</SCRIPT>

<DIV id="trailSprite1" style="position: absolute; height:28px; width:36px;z-index: 100">
<img src="blanktrail.gif" height=28 width=36 border=0 name="trailSprite1img">
</DIV>
<DIV id="trailSprite2" style="position: absolute; height:28px; width:26px;z-index: 10">
<img src="blanktrail.gif" height=28 width=36 border=0 name="trailSprite2img">
</DIV>
<DIV id="trailSprite3" style="position: absolute; height:28px; width:36px;z-index: 10">
<img src="blanktrail.gif" height=28 width=36 border=0 name="trailSprite3img">
</DIV>
<DIV id="trailSprite4" style="position: absolute; height:28px; width:36px;z-index: 10">
<img src="blanktrail.gif" height=28 width=36 border=0 name="trailSprite4img">
</DIV>
<DIV id="trailSprite5" style="position: absolute; height:28px; width:36px;z-index: 10">
<img src="blanktrail.gif" height=28 width=36 border=0 name="trailSprite5img">
</DIV>
<script language="JavaScript1.2">
if (document.all&&window.print)
document.body.style.cssText="overflow-x:hidden;overflow-y:scroll"
</script>

Nota: lo script utilizza delle immagini incluse nel file zip