摘要：<!DOCTYPE html><html><head> <meta charset="utf-8"> <title></title> <script type="text/javascript" src='static/jquery-3.3.1.m
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script type="text/javascript" src='static/jquery-3.3.1.min.js''></script>
<style type="text/css">
a{
float: left;
display: block;
margin: 80px;
width: 100px;
line-height: 100px;
text-align: center;
height: 100px;
color: #fff;
border-radius: 50px;
text-decoration: none;
}
</style>
<script type="text/javascript">
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');
$(this).css('box-shadow','0px 0px 30px '+$bg)
$(this).css('border-radius','20px ')
})
$('a').mouseleave(function(){
$(this).css('box-shadow','none')
$(this).css('border-radius','50px ')
})
$('#btn').click(function(){
aa('a')
})
//记录按钮点击次数 并打印在span标签上
var num = 0;
$('#btn').on('click',function(){
num++;
$('span').text(num)
})
})
</script>
</head>
<body>
<div>
<button id="btn">点击更换随机色</button>
点击次数：<span></span>
</div>
<a href="#">1</a>
<a href="#">2</a>
<a href="#">3</a>
<a href="#">4</a>
<a href="#">5</a>
<a href="#">6</a>
<a href="#">7</a>
<a href="#">8</a>
<a href="#">9</a>
<a href="#">10</a>
<a href="#">11</a>
<a href="#">12</a>
<a href="#">13</a>
<a href="#">14</a>
</body>
</html>
批改老师：天蓬老师批改时间：2019-04-08 09:27:37
老师总结：随机变换颜色, 本质上就是不断的改变GRB的值,要注意变换的范围, 必须是有效值就可以
