紧急求助！如何在网页中加入随鼠标移动的彩色字符？

<SCRIPT language=javascript>
var message="****************************"
var x,y;
var step=12;
var flag=0;
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+10;
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.po