本文執行個體講述了js+css繪製顏色動態變化的圈中圈效果。分享給大家供大家參考，具體如下：
運行效果截圖如下：
具體代碼如下：
<html><head> <title>circle</title> <style type="text/css" > .circle { border-radius:50%; background:#DDDDDD; } .circle_inside { width:80%; height:80%; left:10%; border-radius:50%; background:#494949; position:relative; top:10%; } #circle { margin-left:50%; position:relative; left:-250px; width:500px; height:500px; } </style> <script type="text/javascript" > var c = 'DDDDDD,DFEFFF,494949,C8DB74,46DFDE,59DDDE'.split(','); function create_color() { var color = '', c_length = c.length, random_nmb = Math.floor(Math.random()*c_length); return '#'+c[random_nmb]; } function create_inside_circle(color, id) { return "<div id='"+id+"' class='circle_inside' style='background:"+color+";'></div>"; } function create_all_circle() { var circle_nmb = 15, html = [], id = 0, inside_circle = document.getElementById('circle'); for(var i=0; i<circle_nmb; i++) { id = "circle"+i; inside_circle.innerHTML = create_inside_circle(create_color(), id); inside_circle = document.getElementById(id); } } window.onload = function(){ setInterval(function(){ create_all_circle(); }, 1500); } </script> </head><body> <div class="circle bg1" id="circle"> </div></body></html>
更多關於js特效相關內容感興趣的讀者可查看本站專題：《jQuery動畫與特效用法總結》、《jQuery常見經典特效匯總》及《JavaScript動畫特效與技巧匯總》
希望本文所述對大家JavaScript程式設計有所協助。
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