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>
