<div id="div1">        <a href="http://www.cnblogs.com/ntt1219/">忘了滋味</a>        <a href="http://www.cnblogs.com/ntt1219/">忘了滋味</a>        <a href="http://www.cnblogs.com/ntt1219/">忘了滋味</a>        <a href="http://www.cnblogs.com/ntt1219/">忘了滋味</a>      </div>

body {background: #000 url(index.png) no-repeat center 230px;} #div1 {position:relative; width:450px; height:450px; margin: 20px auto 0; }         #div1 a {position:absolute; top:0px; left:0px; font-family: Microsoft YaHei; color:#fff; font-weight:bold; text-decoration:none; padding: 3px 6px; }         #div1 a:hover {border: 1px solid #eee; background: #000; }         #div1 .blue {color:blue;}         #div1 .red {color:red;}         #div1 .yellow {color:yellow;}

var radius = 120;var dtr = Math.PI/180;var d=300;var mcList = [];var active = false;var lasta = 1;var lastb = 1;var distr = true;var tspeed=10;var size=250;var mouseX=0;var mouseY=0;var howElliptical=1;var aA=null;var oDiv=null;window.onload=function (){ var i=0; var oTag=null;   oDiv=document.getElementById(‘div1‘);   aA=oDiv.getElementsByTagName(‘a‘);   for(i=0;i<aA.length;i++) {  oTag={};     oTag.offsetWidth=aA[i].offsetWidth;  oTag.offsetHeight=aA[i].offsetHeight;     mcList.push(oTag); }   sineCosine( 0,0,0 );   positionAll();   oDiv.onmouseover=function () {  active=true; };   oDiv.onmouseout=function () {  active=false; };   oDiv.onmousemove=function (ev) {  var oEvent=window.event || ev;     mouseX=oEvent.clientX-(oDiv.offsetLeft+oDiv.offsetWidth/2);  mouseY=oEvent.clientY-(oDiv.offsetTop+oDiv.offsetHeight/2);     mouseX/=5;  mouseY/=5; };   setInterval(update, 30);};function update(){ var a; var b;   if(active) {  a = (-Math.min( Math.max( -mouseY, -size ), size ) / radius ) * tspeed;  b = (Math.min( Math.max( -mouseX, -size ), size ) / radius ) * tspeed; } else {  a = lasta * 0.98;  b = lastb * 0.98; }   lasta=a; lastb=b;   if(Math.abs(a)<=0.01 && Math.abs(b)<=0.01) {  return; }   var c=0; sineCosine(a,b,c); for(var j=0;j<mcList.length;j++) {  var rx1=mcList[j].cx;  var ry1=mcList[j].cy*ca+mcList[j].cz*(-sa);  var rz1=mcList[j].cy*sa+mcList[j].cz*ca;     var rx2=rx1*cb+rz1*sb;  var ry2=ry1;  var rz2=rx1*(-sb)+rz1*cb;     var rx3=rx2*cc+ry2*(-sc);  var ry3=rx2*sc+ry2*cc;  var rz3=rz2;     mcList[j].cx=rx3;  mcList[j].cy=ry3;  mcList[j].cz=rz3;     per=d/(d+rz3);     mcList[j].x=(howElliptical*rx3*per)-(howElliptical*2);  mcList[j].y=ry3*per;  mcList[j].scale=per;  mcList[j].alpha=per;     mcList[j].alpha=(mcList[j].alpha-0.6)*(10/6); }   doPosition(); depthSort();}function depthSort(){ var i=0; var aTmp=[];   for(i=0;i<aA.length;i++) {  aTmp.push(aA[i]); }   aTmp.sort (  function (vItem1, vItem2)  {   if(vItem1.cz>vItem2.cz)   {    return -1;   }   else if(vItem1.cz<vItem2.cz)   {    return 1;   }   else   {    return 0;   }  } );   for(i=0;i<aTmp.length;i++) {  aTmp[i].style.zIndex=i; }}function positionAll(){ var phi=0; var theta=0; var max=mcList.length; var i=0;   var aTmp=[]; var oFragment=document.createDocumentFragment();   //随机排序 for(i=0;i<aA.length;i++) {  aTmp.push(aA[i]); }   aTmp.sort (  function ()  {   return Math.random()<0.5?1:-1;  } );   for(i=0;i<aTmp.length;i++) {  oFragment.appendChild(aTmp[i]); }   oDiv.appendChild(oFragment);   for( var i=1; i<max+1; i++){  if( distr )  {   phi = Math.acos(-1+(2*i-1)/max);   theta = Math.sqrt(max*Math.PI)*phi;  }  else  {   phi = Math.random()*(Math.PI);   theta = Math.random()*(2*Math.PI);  }  //坐标变换  mcList[i-1].cx = radius * Math.cos(theta)*Math.sin(phi);  mcList[i-1].cy = radius * Math.sin(theta)*Math.sin(phi);  mcList[i-1].cz = radius * Math.cos(phi);     aA[i-1].style.left=mcList[i-1].cx+oDiv.offsetWidth/2-mcList[i-1].offsetWidth/2+‘px‘;  aA[i-1].style.top=mcList[i-1].cy+oDiv.offsetHeight/2-mcList[i-1].offsetHeight/2+‘px‘; }}function doPosition(){ var l=oDiv.offsetWidth/2; var t=oDiv.offsetHeight/2; for(var i=0;i<mcList.length;i++) {  aA[i].style.left=mcList[i].cx+l-mcList[i].offsetWidth/2+‘px‘;  aA[i].style.top=mcList[i].cy+t-mcList[i].offsetHeight/2+‘px‘;     aA[i].style.fontSize=Math.ceil(12*mcList[i].scale/2)+8+‘px‘;     aA[i].style.filter="alpha(opacity="+100*mcList[i].alpha+")";  aA[i].style.opacity=mcList[i].alpha; }}function sineCosine( a, b, c){ sa = Math.sin(a * dtr); ca = Math.cos(a * dtr); sb = Math.sin(b * dtr); cb = Math.cos(b * dtr); sc = Math.sin(c * dtr); cc = Math.cos(c * dtr);}