/*  Script by kurt.grigg@virgin.net　←オリジナルはここ　*/

ns=(document.layers)?1:0;

Clrs=new Array('ff0000','00ff00','ffffff','ff00ff','ffa500','ffff00','00ff00','ffffff','ff00ff')
yBase=0;
xBase=0;
step=3;
currStep=0;
Ypos=0;
Xpos=0;
if (ns){
for (i=0; i < 19; i++)//19と言う数字大きくすると太くなる(3箇所あるよ）
document.write('<LAYER NAME="n'+i+'" LEFT=0 TOP=0 CLIP="0,0,'+i/4+','+i/4+'"></LAYER>');
window.captureEvents(Event.MOUSEMOVE);  
function nMouse(evnt){
Ypos = evnt.pageY;
Xpos = evnt.pageX;
}
window.onMouseMove=nMouse;
}
else{
document.write('<div style="position:absolute;top:0;left:0"><div style="position:relative">');
for (i=0; i < 19; i++)
{document.write('<div id="me'+i+'" style="position:absolute;top:0;left:0;width:'+i/4+';height:'+i/4+';font-size:'+i/4+'"></div>')}
document.write('</div></div>');
function iMouse(event){
if(!event){event=window.event}
Ypos=event.clientY+(document.all?document.body.scrollTop:window.scrollY);
Xpos=event.clientX+(document.all?document.body.scrollLeft:window.scrollX);
}
document.onmousemove = iMouse;
}
function Comet(){
var yBase=(document.all)?window.document.body.clientHeight/4:window.innerHeight/4;
var xBase=(document.all)?window.document.body.clientWidth/4:window.innerWidth/4;
for (i=0; i < 19; i++){
var randCol=Math.round(Math.random()*8);
var layer=(document.layers)?document.layers['n'+i]:document.getElementById("me"+i).style;
layer.top =Ypos + yBase*Math.cos((currStep+i*4)/12)*Math.cos(0.7+currStep/200);
layer.left=Xpos + xBase*Math.sin((currStep+i*3)/10)*Math.sin(8.2+currStep/400);
if (ns) layer.bgColor=Clrs[randCol];else layer.backgroundColor=Clrs[randCol];
}
currStep+=step;
setTimeout("Comet()",10);
}
if(document.all&&!document.getElementById){document.getElementById=function(id){return document.all(id)}}
setTimeout("Comet()",1000);