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js 标签云效果
下载：http://files.cnblogs.com/zjfree/js_tag_list.rar
效果如下：
源码如下：
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <style type="text/css">#div1 {position:relative; width:285px; height:280px; }#div1 a {position:absolute; top:0px; left:0px; font-family: Microsoft YaHei; color:#cc0000; text-decoration:none; text-shadow:#999; font-weight:600}#div1 a:hover {border: 1px solid #eee; background:#fff000; padding:3px;}body { margin-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px;}</style><script type="text/javascript" >var radius = 125;var dtr = Math.PI/500;var d=200;var mcList = [];var active = false;var lasta = 1;var lastb = 1;var distr = true;var tspeed=40;var size=200;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={}; aA[i].style.color = ‘#‘+(‘00000‘+(Math.random()*0x1000000<<0).toString(16)).slice(-6);; 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);} </script> </head> <body> <div id="div1"> <a href="#" target="_blank" style="color:">中国</a><a href="#" target="_blank" style="color:">消费者</a><a href="#" target="_blank" style="color:">消费</a><a href="#" target="_blank" style="color:">北京</a><a href="#" target="_blank" style="color:">奶粉</a><a href="#" target="_blank" style="color:">世界杯</a><a href="#" target="_blank" style="color:">品牌</a><a href="#" target="_blank" style="color:">食品安全</a><a href="#" target="_blank" style="color:">市场</a><a href="#" target="_blank" style="color:">上海</a><a href="#" target="_blank" style="color:">奇瑞</a><a href="#" target="_blank" style="color:">重工</a><a href="#" target="_blank" style="color:">珠宝</a><a href="#" target="_blank" style="color:">时代</a><a href="#" target="_blank" style="color:">广州</a><a href="#" target="_blank" style="color:">食品</a><a href="#" target="_blank" style="color:">企业</a><a href="#" target="_blank" style="color:">产品</a><a href="#" target="_blank" style="color:">专家</a><a href="#" target="_blank" style="color:">互联网</a><a href="#" target="_blank" style="color:">工商局</a><a href="#" target="_blank" style="color:">问题</a><a href="#" target="_blank" style="color:">活动</a><a href="#" target="_blank" style="color:">营销</a><a href="#" target="_blank" style="color:">福喜</a><a href="#" target="_blank" style="color:">总局</a><a href="#" target="_blank" style="color:">手机</a><a href="#" target="_blank" style="color:">公益</a><a href="#" target="_blank" style="color:">体验</a><a href="#" target="_blank" style="color:">宝贝</a><a href="#" target="_blank" style="color:">质量</a><a href="#" target="_blank" style="color:">文化</a><a href="#" target="_blank" style="color:">工商</a><a href="#" target="_blank" style="color:">进口</a><a href="#" target="_blank" style="color:">汽车</a><a href="#" target="_blank" style="color:">夏日</a><a href="#" target="_blank" style="color:">服务</a><a href="#" target="_blank" style="color:">移动</a><a href="#" target="_blank" style="color:">深圳</a><a href="#" target="_blank" style="color:">宝宝</a><a href="#" target="_blank" style="color:">合生</a><a href="#" target="_blank" style="color:">纸尿裤</a><a href="#" target="_blank" style="color:">美食</a><a href="#" target="_blank" style="color:">山西</a><a href="#" target="_blank" style="color:">行业</a><a href="#" target="_blank" style="color:">国际</a><a href="#" target="_blank" style="color:">时尚</a><a href="#" target="_blank" style="color:">价格</a><a href="#" target="_blank" style="color:">升级</a><a href="#" target="_blank" style="color:">消法</a></div> </body> </html>
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