js鼠标环绕效果

<style type="text/css">
.huanrao {font-size:9pt; color=#ff0000; POSITION: absolute;}
</style>
<script language="JavaScript">
<!--
msg="欢迎大家学习JavaScript这门语言" 
mousex=0
mousey=0
mspeed=Math.PI/60       
mradius=70             
mousems=new Array()
if(document.layers){
for(i=0;i<=msg.length;i++)
document.write("<layer name='mousetext"+i+"'>"+msg.charAt(i)+"</layer>")
}
else
for(i=0;i<=msg.length;i++)
document.write("<span id='mousetext"+i+"' class='huanrao'>"+msg.charAt(i)+"</span>")
for(i=0;i<=msg.length;i++){
mousems[i]=document.all["mousetext"+i].style
mousems[i].deg=Math.PI*2/msg.length*i}
document.onmousemove=function m(e){
if(!e)e=event
mousex=document.body.scrollLeft+e.clientX      
mousey=document.body.scrollTop+e.clientY    
run()}

function run(){
for(i=mousems.length-1;i>=0;i--){
  mousems[i].deg+=mspeed
  mousems[i].left=mousex-Math.sin(mousems[i].deg)*mradius     
  mousems[i].top=mousey+Math.cos(mousems[i].deg)*mradius} 
}
setInterval(run,100)     
//-->
</script>