摘要：<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content=&q
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script src="/jQuery/jQuery-3.3.1.js"></script>
<style>
a{border-radius: 50px; float: left;display: block;height: 50px;width: 50px;margin-top: 50px;margin-left: 50px;line-height: 50px;text-align: center;color: aqua;}
</style>
<script>
function aa(tag){
var len=document.getElementsByTagName(tag).length
for(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 h(c){
var l=document.getElementsByTagName(c).length
for(i=0;i<l;i++){
document.getElementsByTagName(c)[i].innerHTML=Math.floor(Math.random()*1000)
}
}
$(function(){
aa('a')
$('.bt1').click(function(){
aa('a');
h('a')
})
$('a').mouseover(function(){
$bg=$(this).css('backgroundColor')
$(this).css('box-shadow','0px 0px 10px '+$bg)
$(this).css('borderRadius','20px')
})
$('a').mouseleave(function(){
$(this).css('box-shadow','none')
$(this).css('borderRadius','50px')
})
})
</script>
</head>
<body>
<a href="#">1</a>
<a href="#">2</a>
<a href="#">3</a>
<a href="#">4</a>
<button>随机</button>
</body>
</html>
