CURSOR TRAIL

This script puts a trailing image behind the cursor as it moves but disappears when stationary.

Code:

<SCRIPT language="Javascript1.2">

var isNS = (navigator.appName == "Netscape");
layerRef = (isNS) ? "document" : "document.all";
styleRef = (isNS) ? "" : ".style";

var queue = new Array();

var NUM_OF_TRAIL_PARTS = 6

for (x=1; x < 7; x++) { ///////////////Image Preload
eval("trailSpriteFrame" + x + " = new Image(28,36);");
eval("trailSpriteFrame" + x + ".src = 'trailgif" + x + ".gif';");
}

////////////////////////////////////////////////The trail Object

function trailSpriteObj(anID) {
this.trailSpriteID = "trailSprite" + anID; //as before
this.imgRef = "trailSprite" + anID + "img"; //reference to the sprites image name
this.currentFrame = 1; //the varible for looking after the frame
this.animateTrailSprite = animateTrailSprite; //declare the objects method cycle
}

function animateTrailSprite() {
if (this.currentFrame <6 ) { //if there are animation frames left, the change sprites the current frame
if (isNS) { //Detect the browser and perform coresponding image switch
eval("document." + this.trailSpriteID +".document['"+ this.imgRef + "'].src = trailSpriteFrame" + this.currentFrame + ".src");
} else {
eval("document['" + this.imgRef + "'].src = trailSpriteFrame" + this.currentFrame + ".src");
}
this.currentFrame ++; //and increase the objects current frame
} else { //the current frame has reached its limit so hide the sprite
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; //reset the objects frame number & make the sprite visible again
eval(layerRef + '.' + queue[0].trailSpriteID + styleRef + '.visibility = "visible"');

return queue[0].trailSpriteID;
}

function init() {

for(x=0; x<NUM_OF_TRAIL_PARTS; x++) //fill array with trail objects
queue[x] = new trailSpriteObj(x+1) ;

if (isNS) { document.captureEvents(Event.MOUSEMOVE); }
document.onmousemove = processMouse;

setInterval("processAnim();",25);
}

window.onload = init;

</SCRIPT>

<style><!--
#trailsprite1 { position: absolute; z-index: 100; top: 1px; left: 0px; width: 10px; height: 10px; visibility: visible }
#trailsprite2 { position: absolute; z-index: 10; top: 0px; left: 0px; width: 10px; height: 10px; visibility: visible }
#trailsprite3 { position: absolute; z-index: 10; top: 0px; left: 0px; width: 10px; height: 10px; visibility: visible }
#trailsprite4 { position: absolute; z-index: 10; top: 0px; left: 0px; width: 10px; height: 10px; visibility: visible }
#trailsprite5 { position: absolute; z-index: 10; top: 0px; left: 0px; width: 10px; height: 10px; visibility: visible }
#trailsprite6 { position: absolute; z-index: 10; top: 0px; left: 0px; width: 10px; height: 10px; visibility: visible }
ol { font: 10pt arial, geneva, sans-serif }-->
</style>
<DIV id="trailSprite1"><IMG src="trailgif5.gif" height="10" width="10" border="0" name="trailSprite1img"></DIV>
<DIV id="trailSprite2"><IMG src="trailgif5.gif" height="10" width="10" border="0" name="trailSprite2img"></DIV>
<DIV id="trailSprite3"><IMG src="trailgif5.gif" height="10" width="10" border="0" name="trailSprite3img"></DIV>
<DIV id="trailSprite4"><IMG src="trailgif5.gif" height="10" width="10" border="0" name="trailSprite4img"></DIV>
<DIV id="trailSprite5"><IMG src="trailgif5.gif" height="10" width="10" border="0" name="trailSprite5img"></DIV>
<DIV id="trailSprite6"><IMG src="trailgif5.gif" height="10" width="10" border="0" name="trailSprite6img"></DIV>