abstract：<!DOCTYPE html><html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> &nbs
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>获取随机色</title>
<script type="text/javascript" src="js/jquery.js"></script>
<style type="text/css">
a {
float:left;
display:block;
margin:250px;
width:500px;
line-height: 500px;
text-align: center;
height:500px;
color:#fff;
border-radius: 50px;
text-decoration: none;
}
button{
width: 300px;
height:100px;
background:#00ff00;
}
</style>
<script type="text/javascript">
//改变标签的背景颜色
$(document).ready(function(){
$('button').click(function(){
function aa(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)+')'
}
}
$(document).ready(function(){
aa('a')
$('a').mouseover(function(){
$bg=$(this).css('backgroundColor')
$(this).css('box-shadow','0px 0px 20px '+$bg)
$(this).css('border-radius','20px ')
})
$('a').mouseleave(function(){
$(this).css('box-shadow','none')
$(this).css('border-radius','250px ')
})
})
})
})
</script>
</head>
<body>
<button>刷新</button>
<a href="#">1</a>
<a href="#">2</a>
<a href="#">3</a>
<a href="#">4</a>
</body>
</html>
Correcting teacher：西门大官人Correction time：2019-04-22 10:06:57
Teacher's summary：随机色的原理是什么？最好简单写一下。还有js代码要加上分号，规范。群里说过很多次了