<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>随机获取颜色</title>
<script type="text/javascript" src="jquery-3.3.1.min.js"></script>
<style type="text/css">
a{
float:left;
display: block;
margin:50px;
width: 100px;
line-height: 100px;
text-align: center;
height: 100px;
color: #fff;
border-radius: 50px;
text-decoration: none;
box-shadow:
}
</style>
<script type="text/javascript">
//改变标签的背景颜色
function changeColor(tag){
var len = document.getElementsByTagName(tag).length
for(var i=0;i<len;i++){
document.getElementsByTagName(tag)[i].style.backgroundColor = 'rgb('+Math.floor(Math.random()*256)+','+Math.floor(Math.random()*256)+','+Math.floor(Math.random()*256)+')'
}
}
$(function(){
setInterval(function(){
changeColor('a');
},500);
$('a').hover(function(){
$bg = $(this).css('backgroundColor') //获取当前a的背景色
$(this).css('box-shadow','0px 0px 20px '+$bg)
$(this).css('border-radius','20px');
},function(){
$(this).css('box-shadow','none')
$(this).css('border-radius','50px');
})
})
</script>
</head>
<body>
<a href="#">1</a>
<a href="#">2</a>
<a href="#">3</a>
<a href="#">4</a>
</body>
</html>
