本文实例讲述了js+css绘制颜色动态变化的圈中圈效果。分享给大家供大家参考，具体如下：
运行效果截图如下：
具体代码如下：
<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>
希望本文所述对大家JavaScript程序设计有所帮助。
