【参加讨论】把如下代码加入<body>区域中
<script language="javascript">
<!--
colours=new array('#ffffff','#ff0000','#00ff00','#ffffff','#ff00ff','#ffa500','#fff000','#0000ff','#ffffff')
y = 0;
x = 0;
n6=(document.getelementbyid&&!document.all);
ns=(document.layers);
ie=(document.all);
d=(ns||ie)?'document.':'document.getelementbyid("';
a=(ns||n6)?'':'all.';
n6r=(n6)?'")':'';
s=(ns)?'':'.style';
n=(n6)?9:10;
if (ns){
for (i = 0; i < n; i++)
document.write('<layer name="dots'+i+'" top=0 left=0 width='+i/2+' height='+i/2+' bgcolor=#ff0000></layer>');
}
if (ie)
document.write('<div id="con" style="position:absolute;top:0px;left:0px"><div style="position:relative">');
if (ie||n6){
for (i = 0; i < n; i++)
document.write('<div id="dots'+i+'" style="position:absolute;top:0px;left:0px;width:'+i/2+'px;height:'+i/2+'px;background:#ff0000;font-size:'+i/2+'"></div>');
}
if (ie)
document.write('</div></div>');
(ns||n6)?window.captureevents(event.mousemove):0;
function mouse(evnt){
y = (ns||n6)?evnt.pagey+4 - window.pageyoffset:event.y+4;
x = (ns||n6)?evnt.pagex+1:event.x+1;
}
(ns)?window.onmousemove=mouse:document.onmousemove=mouse;
function animate(){
h=(ns||n6)?window.innerheight:document.body.clientheight;
w=(ns||n6)?window.innerwidth:document.body.clientwidth;
o=(ns||n6)?window.pageyoffset:0;
if (ie)con.style.top=document.body.scrolltop;
for (i = 0; i < n; i++){
var temp1 = eval(d+a+"dots"+i+n6r+s);
var randcolours = math.floor(math.random()*colours.length);
(ns)?temp1.bgcolor = colours[randcolours]:temp1.background = colours[randcolours];
if (i < n-1){
var temp2 = eval(d+a+"dots"+(i+1)+n6r+s);
temp1.top = parseint(temp2.top);
temp1.left = parseint(temp2.left);
}
else{
temp1.top = y+o;
temp1.left = x;
}
if ((y < h/10) || (y > h-h/10) || (x < w/10) || (x > w-w/10)){
var temp3 = eval(d+a+"dots"+0+n6r+s);
temp3.top = (y-25)+math.random()*50;
temp3.left = (x-25)+math.random()*50;
temp2.top = parseint(temp3.top)+o;
temp2.left = parseint(temp3.left);
}
}
settimeout("animate()",30);
}
animate();
// -->
</script>
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