Код:
<style>
.spanstyle {
	position:absolute;
	visibility:visible;
	top:-50px;
	font-size:15pt;
	font-family:Arial;
         font-weight:bold;
	color:black;
}
</style>
<script>


var x,y
var step=20
var flag=10


var message="мышиный выводок "
message=message.split("")

var xpos=new Array()
for (i=0;i<=message.length-1;i++) {
	xpos[i]=-50
}

var ypos=new Array()
for (i=0;i<=message.length-1;i++) {
	ypos[i]=-50
}

function handlerMM(e){
	x = (document.layers) ? e.pageX : document.body.scrollLeft+event.clientX
	y = (document.layers) ? e.pageY : document.body.scrollTop+event.clientY
	flag=1
}

function makesnake() {
	if (flag==1 && document.all) {
    	for (i=message.length-1; i>=1; i--) {
   	xpos[i]=xpos[i-1]+step
	ypos[i]=ypos[i-1]
    	}
xpos[0]=x+step
ypos[0]=y
	
for (i=0; i<message.length-1; i++) {
    var thisspan = eval("span"+(i)+".style")
    thisspan.posLeft=xpos[i]
	thisspan.posTop=ypos[i]
    	}
	}
	
	else if (flag==1 && document.layers) {
    	for (i=message.length-1; i>=1; i--) {
   	xpos[i]=xpos[i-1]+step
	ypos[i]=ypos[i-1]
    	}
xpos[0]=x+step
ypos[0]=y
	
for (i=0; i<message.length-1; i++) {
    var thisspan = eval("document.span"+i)
    thisspan.left=xpos[i]
	thisspan.top=ypos[i]
    	}
	}
var timer=setTimeout("makesnake()",30)
}

makesnake();
</script>
<script>
<!-- Beginning of JavaScript -

for (i=0;i<=message.length-1;i++) {
    document.write("<span id='span"+i+"' class='spanstyle'>")
	document.write(message[i])
    document.write("</span>")
}

if (document.layers){
	document.captureEvents(Event.MOUSEMOVE);
}
document.onmousemove = handlerMM;

// - End of JavaScript - -->
</script>